The coefficient of static friction between a 20 kg weight and a football turf is .85. Force of approximately 166.6 Newtons (N) is needed to make the weight start moving.
The force needed to make the 20 kg weight start moving can be determined using the coefficient of static friction. The equation for static friction is:
Frictional force = coefficient of static friction * normal force
The normal force is the force exerted by the surface perpendicular to the weight. In this case, it is equal to the weight of the object, which can be calculated as the mass (20 kg) multiplied by the acceleration due to gravity (9.8 m/s^2):
Normal force = mass * gravity = 20 kg * 9.8 m/s^2 = 196 N
Now, we can calculate the force needed to make the weight start moving:
Frictional force = 0.85 * 196 N ≈ 166.6 N
Therefore, a force of approximately 166.6 Newtons (N) is needed to overcome the static friction and make the 20 kg weight start moving on the football turf. This force must be applied in the opposite direction to the frictional force to initiate motion.
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A hockey puck slides off the edge of a horizontal platform with an initial velocity of 28.0 m/s horizontally. The height of the platform above the ground is 2.00 m. What is the direction of the velocity of the puck just before it hits the ground? Neglect air resistance. Give the angle with the + x-axis
* **Step 1: Identify the relevant information.**
We are given the following information:
* The initial velocity of the puck is 28.0 m/s horizontally.
* The height of the platform above the ground is 2.00 m.
* We can neglect air resistance.
* **Step 2: Set up the equations.**
We can use the following equations to solve for the direction of the velocity of the puck just before it hits the ground:
* $v_y = v_0y + at$
* $y = y_0 + v_0yt + \frac{1}{2}at^2$
Where:
* $v_y$ is the final velocity in the vertical direction
* $v_0y$ is the initial velocity in the vertical direction
* $a$ is the acceleration due to gravity (9.8 m/s^2)
* $t$ is the time
* $y$ is the vertical position
* $y_0$ is the initial vertical position
* **Step 3: Solve for the unknowns.**
We can solve for the final velocity in the vertical direction using the following equation:
```
v_y = v_0y + at
```
Plugging in the known values, we get:
```
v_y = 0 + (-9.8) t
```
```
v_y = -9.8t
```
We can solve for the time using the following equation:
```
y = y_0 + v_0yt + \frac{1}{2}at^2
```
Plugging in the known values, we get:
```
2 = 0 + (0) t + \frac{1}{2}(-9.8)t^2
```
```
4 = -4.9t^2
```
```
t^2 = -0.816
```
```
t = -0.90
```
We can now solve for the final velocity of the puck using the following equation:
```
v_y = -9.8t
```
Plugging in the known value for $t$, we get:
```
v_y = -9.8(-0.90)
```
```
v_y = 8.82 m/s
```
The final velocity of the puck in the vertical direction is 8.82 m/s downward.
* **Step 4: Find the angle.**
The angle of the velocity of the puck can be found using the following equation:
```
\theta = \tan^{-1} \left ( \frac{v_y}{v_x} \right )
```
Plugging in the known values for $v_y$ and $v_x$, we get:
```
\theta = \tan^{-1} \left ( \frac{8.82}{28.0} \right )
```
```
\theta = 12.6^\circ
```
Therefore, the direction of the velocity of the puck just before it hits the ground is 12.6 degrees below the horizontal.
Gia is creating an ad for her new workout studio. She wants to appeal to people in the area to give her studio a try. Which is an example of an emotional appeal?
A.
Regular exercise can decrease a person’s health risks and increase their life span.
B.
Buying a membership will save a person 30 percent off as opposed to paying per visit.
C.
Our community will be brighter, happier, and healthier if everyone becomes a member!
D.
You deserve to feel good about yourself! Working out at my studio can do that for you!
In a case whereby Gia is creating an ad for her new workout studio. She wants to appeal to people in the area to give her studio a try an example of an emotional appeal is D.You deserve to feel good about yourself! Working out at my studio can do that for you!
What is emotional appeal?An debate an be won through thepeocess of emotional appeal, beaue it is an emotional manipulation, as opposed to utilizing reason and logic.
An informal fallacyan be described a the argumentum ad passiones tht encopass the process of appealing to the recipient's emotions in attempt to win an argument, particularly in the absence of factual evidence.
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The diagram below shows snapshots of an
oscillator at different times. What is the amplitude
of the oscillation?
C
A
B
D
t=0.0 s t=0.30 s t=0.45 s t=0.90 s
+0.10 m.
www.
0
-0.10 m
(Unit = m)
E
t=1.35 s
www
F
t=1.80 s
0
The amplitude of the oscillation is +0.10 m, as shown in snapshots A and E.
Oscillation refers to a repetitive back-and-forth or up-and-down motion of an object or system about an equilibrium position. This motion can be periodic or non-periodic.
The amplitude of an oscillation is the maximum displacement of the object or system from its equilibrium position during one cycle of motion. It is the distance between the equilibrium position and either the crest or trough of the wave. The amplitude determines the energy of the oscillation, with larger amplitudes corresponding to greater energy. In the context of waves, amplitude can also refer to the maximum displacement of the medium from its rest position.
Therefore, The amplitude of the oscillation is +0.10 m, as shown in snapshots A and E.
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A wave along a string has the following equation where x is in meters and t is in seconds. Y = 0.02 sin(24 t – 4.3 x) mm. Find the amplitude of the wave?
Answer: 0.02 mm
Explanation: General equation for wave has amplitude as the number that is multiplied by the trig ratio sine or cosine. The number in this case is 0.02. Since the y-value is in mm, the amplitude is 0.02 mm.
A horse stands with its front leg raised off the ground, as shown in the figure. The left hind and right forelegs each support 300 Ib of the total weight, which is 1000 1b. a) What force is exerted by the right hind leg? b) Calculate the position of the center of gravity of the horse.
a) The force exerted by the right hind leg is 400 lb.
b) The position of the center of gravity of the horse is 6.67 ft from the left hind leg.
How to determine force and position?a) According to the problem, the total weight of the horse is 1000 lb, and the left hind and right forelegs each support 300 lb.
That means the weight supported by the right hind leg is:
Weight supported by right hind leg = Total weight - Weight supported by left hind leg - Weight supported by right foreleg
Weight supported by right hind leg = 1000 lb - 300 lb - 300 lb
Weight supported by right hind leg = 400 lb
Therefore, the force exerted by the right hind leg is 400 lb.
b) To calculate the position of the center of gravity of the horse, find the point where the weight of the horse can be considered to act. Assuming that the horse is symmetric, this point should be exactly halfway between the left and right legs that support the weight.
So, calculate the position of the center of gravity as follows:
Position of center of gravity = Distance from left leg to center of gravity
Distance from left leg to center of gravity = Distance from right leg to center of gravity
Distance from left leg to center of gravity = (Weight supported by right hind leg) × (Distance between legs) / (Total weight supported by both hind legs)
Distance from left leg to center of gravity = (400 lb) × (10 ft) / (600 lb)
Distance from left leg to center of gravity = 6.67 ft
Therefore, the position of the center of gravity of the horse is 6.67 ft from the left hind leg.
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A 6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is ? cm.
A 6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is 3 cm
To find the height of the image, we can use the magnification formula:
Magnification (M) = Image height (h') / Object height (h) = Image distance (d') / Object distance (d)
We are given:
- Object height (h) = 6 cm
- Object distance (d) = 8 cm
- Image distance (d') = 4 cm
We need to find the image height (h').
First, let's find the magnification (M) using the formula:
M = d' / d = 4 cm / 8 cm = 0.5
Now, we can find the image height (h'):
h' = M * h = 0.5 * 6 cm = 3 cm
So, the height of the image is 3 cm.
The question was Incomplete, Find the full content below :
A 6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is ___ cm.
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A 1000 kg rollercoaster requires a braking force of 8780N from point D to point E in order to stop. Find
a) The Total Mechanical Energy of the rollercoaster at Point A. b) The velocity of the coaster at point A. c)
The velocity of the coaster at point B. d) The highest hill the coaster could have gotten over before point A
with no additional mechanical energy. (Ans. a) 591,100 J b) 2.5 m/s c) 34.4 m/s d) 60.3 m)
The total mechanical energy at point A is 617,400 J, and the velocity of the coaster at point A is 25 m/s, the velocity of the coaster at point B is 34.4 m/s. and the highest hill the coaster could have gotten over before point A with no additional mechanical energy is 63 m.
To solve this problem, we can use the conservation of mechanical energy, which states that the sum of kinetic energy and potential energy is constant in a closed system where there is no work done by non-conservative forces like friction. We can use this principle to find the answers to the questions.
a) The Total Mechanical Energy of the rollercoaster at Point A
The total mechanical energy of the rollercoaster at point A is the sum of its potential energy and kinetic energy. At point A, the rollercoaster is at its highest point, so its kinetic energy is zero. Therefore, the total mechanical energy at point A is equal to the potential energy, which is given by:
mgh = 1000 kg × 9.8 m/s^2 × 63 m = 617,400 J
b) The velocity of the coaster at point A
To find the velocity of the coaster at point A, we can use the conservation of mechanical energy principle again. At point A, all of the potential energy is converted into kinetic energy. Therefore, we can write:
1/2 mv^2 = mgh
where m is the mass of the rollercoaster, v is the velocity at point A, g is the acceleration due to gravity, and h is the height of point A relative to point E. Solving for v, we get:
v = sqrt(2gh) = sqrt(2 × 9.8 m/s^2 × 63 m) = 25 m/s
Therefore, the velocity of the coaster at point A is 25 m/s.
c) The velocity of the coaster at point B
To find the velocity of the coaster at point B, we can use the conservation of mechanical energy principle again. At point B, the rollercoaster is at a height of 42 m above the ground. Therefore, the potential energy at point B is:
mgh = 1000 kg × 9.8 m/s^2 × 42 m = 411,600 J
At point B, some of the potential energy is converted into kinetic energy, so we can write:
1/2 mv^2 + mgh = mgh_D
where v is the velocity at point B, h is the height of point B relative to point E, and h_D is the height of point D relative to point E. Solving for v, we get:
v = sqrt(2(mgh_D - mgh)/m) = sqrt(2(8780 J)/1000 kg + 2gh) = 34.4 m/s
Therefore, the velocity of the coaster at point B is 34.4 m/s.
d) The highest hill the coaster could have gotten over before point A with no additional mechanical energy
If the rollercoaster had no additional mechanical energy, its total mechanical energy at point A would be equal to its potential energy, which we calculated in part (a) to be 617,400 J. Therefore, the maximum height that the rollercoaster could reach without any additional mechanical energy is given by:
mgh_max = 617,400 J
Solving for h_max, we get:
h_max = 617,400 J / (1000 kg × 9.8 m/s^2) = 63 m
So, the highest hill the coaster could have gotten over before point A with no additional mechanical energy is 63 m.
Therefore, The coaster has a total mechanical energy of 617,400 J at point A, a velocity of 25 m/s, a velocity of 34.4 m/s, and a maximum hill height of 63 m that it could have traversed without using any further mechanical energy.
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Which statements are true regarding the area of circles and sectors? Check all that apply.
The area of a circle depends on the length of the radius.
The area of a sector depends on the ratio of the central angle to the entire circle.
The area of a sector depends on pi.
The area of the entire circle can be used to find the area of a sector.
The area of a sector can be used to find the area of a circle
Answer:
Explanation:
The following statements are true regarding the area of circles and sectors:
The area of a circle depends on the length of the radius.
The area of a sector depends on the ratio of the central angle to the entire circle.
The area of a sector can be used to find the area of a circle.
Linearise the following equations, also indicate (with the aid of a sketch) what would be plotted on the y- and x-axis and what would be obtained from the slope and intercept. Variables are indicated in brackets. Y=aX¹ C=aT + BT² (i) (ii) (Y, X) (C, T) [6]
i) The slope of the line (m) would be ln(a), and the intercept (c) would be 0.
ii) The slope and intercept obtained from the linearized equations provide valuable information about the relationship between the variables involved.
To linearize the given equations, we need to rewrite them in a linear form. Let's work through each equation:
(i) Y = aX¹
To linearize this equation, we can take the natural logarithm (ln) of both sides:
ln(Y) = ln(aX¹)
Using the logarithmic property, we can simplify it as:
ln(Y) = ln(a) + ln(X¹)
Now, we can introduce a new variable, let's say ln(Y), and rewrite the equation as:
ln(Y) = ln(a) + X¹ln(X)
Now, we have a linear equation in the form Y' = mX' + c, where Y' = ln(Y), X' = ln(X), m = ln(a), and c = 0. In this linearized form, Y' would be plotted on the y-axis, and X' would be plotted on the x-axis. The slope of the line (m) would be ln(a), and the intercept (c) would be 0.
(ii) C = aT + BT²
To linearize this equation, we can introduce a new variable, let's say Z, defined as Z = C/T. Now, we can rewrite the equation as:
Z = a + BT
Now, we have a linear equation in the form Z = mT + c, where Z = C/T, m = B, and c = a. In this linearized form, Z would be plotted on the y-axis, and T would be plotted on the x-axis. The slope of the line (m) would be B, and the intercept (c) would be a.
By linearizing the equations, we can transform the nonlinear relationships into linear relationships, which allows for easier analysis and interpretation of the data. The slope and intercept obtained from the linearized equations provide valuable information about the relationship between the variables involved.
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A 8.0 cm long piece of wire is formed into a square and carries a clockwise current of 0.15 A. The loop is placed inside a solenoid, and the plane of the loop is perpendicular to the solenoid's magnetic field. The solenoid carries a counterclockwise current of 17.0 A and has 25 turns per centimeter. What is the force on each side of the loop?
The force on each side of the loop is 5.1 × 10^-5 N in the direction perpendicular to the wire and the magnetic field, and the direction of the force is determined by the right-hand rule.
The force on each side of the loop can be calculated using the formula F = BIL, where F is the force, B is the magnetic field, I is the current, and L is the length of the wire.
First, we need to find the magnetic field inside the solenoid. The magnetic field inside a solenoid is given by B = μ₀nI, where μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current.
In this case, the magnetic field inside the solenoid is B = μ₀nI = (4π × 10^-7 T·m/A)(25 turns/cm)(17.0 A) = 0.017 T.
Since the loop is perpendicular to the magnetic field, the angle between the current and the magnetic field is 90 degrees, and the force on each side of the loop is given by F = BIL. The length of each side of the square loop is L = 8.0 cm/4 = 2.0 cm.
Therefore, the force on each side of the loop is F = (0.017 T)(0.15 A)(2.0 cm) = 5.1 × 10^-5 N.
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Q3. The curvilinear motion of a particle is defined by v, =50-16t and y=100-4t', where v, is in meters per second, y is in meters, and t is in seconds. It is also known that x=0 when t=0.Plot the path of the particle and determine its velocity and acceleration when the position y=0 is reached, Write the vector representation of the answer.
The velocity is [tex]10\hat{i}-16\hat{j} m/s[/tex] and the acceleration is [tex]-16\hat{i} -8\hat{j} m/s^2[/tex]
The given equations are:
[tex]v_x = 50 - 16t\\y = 100 - 4t^2[/tex]
x = 0, when t = 0
To plot the path of the particle, we need to eliminate t from the given equations and express y in terms of x. Using the given information, we have:
[tex]t = (50 - v_x) / 16\\y = 100 - 4t^2 = 100 - 4[(50 - v_x) / 16]^2[/tex]
Simplifying the above equation, we get:
[tex]y = (25/2) - (5/4)v_x + (1/32)v_x^2[/tex]
This is the equation of the path followed by the particle.
To determine the velocity and acceleration when y = 0, we need to find the corresponding value of [tex]v_x[/tex]. Setting y = 0 in the above equation, we get:
[tex]v_x = 20 or v_x = 10[/tex]
When v_x = 20, the particle is moving in the positive x-direction. The velocity and acceleration can be calculated as follows:
Velocity =[tex](v_x, v_y) = (20, -32)[/tex]
Acceleration = [tex](a_x, a_y) = (-16, -8)[/tex]
When [tex]v_x = 10[/tex], the particle is moving in the negative x-direction. The velocity and acceleration can be calculated as follows:
Velocity =[tex](v_x, v_y) = (10, -16)[/tex]
Acceleration = [tex](a_x, a_y) = (-16, -8)[/tex]
Therefore, the vector representation of the velocity and acceleration when y = 0 are:
For[tex]v_x = 20[/tex]: Velocity = (20, -32) m/s; Acceleration = (-16, -8) [tex]m/s^2[/tex]
For[tex]v_x = 10[/tex]: Velocity = (10, -16) m/s; Acceleration = (-16, -8)[tex]m/s^2[/tex]
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/ Assignment 01 Science teachers think practical science is a good thing. a. Agree b. Disagree c. Uncertain
It is reasonable to conclude that science teachers generally agree that practical science is beneficial. Therefore, option (A) is correct.
Practical science refers to hands-on activities, experiments, and applications of scientific concepts in real-world settings. Science teachers, who are experts in their field and experienced in teaching science, understand the importance of practical science in facilitating students' understanding, engagement, and application of scientific principles.
Practical science allows students to develop critical thinking, problem-solving, and inquiry skills, as well as promoting a deeper understanding of scientific concepts. It also fosters curiosity, creativity, and a passion for science, making it an effective and essential component of science education.
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Read this excerpt from a visit to Europe which satirical element is mukharji most clearly using in this excerpt
The specific satirical element used by a writer would depend on the context and purpose of their writing.
As an AI language model, I do not have access to a specific excerpt. However, satire is a literary technique used to expose and criticize human vices, foolishness, or shortcomings through humor, irony, or exaggeration. It often employs irony, sarcasm, or ridicule to expose and critique societal issues or individual behavior. The most common satirical elements include hyperbole, parody, irony, and sarcasm.
For example, hyperbole is an exaggeration used to make a point, such as when a satirist might exaggerate the absurdity of a situation or person. Parody is the use of imitation to ridicule or criticize a particular style or individual. Irony is the use of language to convey a meaning opposite to its literal sense. Sarcasm is the use of words to convey contempt or ridicule, often by saying the opposite of what is meant.
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Answer:
a
Explanation:
I fact checked
If 500 mL is infused over 2 days, what is the flow rate (gtts/min)? The calibration of the tubing is 15 gtts/mL. (Round to the nearest hundredth mL with no units!)
Explanation:
500 ml * 15 dtts/ml / ( 24 hrs/ day * 2 days * 60 min / hr ) = 2.6 gtts/min
Gerry max does great effort to stay awake studying all night long. he decides to make a cup of coffee by first placing a 200W electric immersion heater in 0.32kg of water. How much energy is needed to totally vaporize the water being heated
After considering all the given data we conclude that the the amount of energy needed to vaporize the water completely is 722.24 kJ.
The energy needed to vaporize water is reffered to as the heat of vaporization. The heat of vaporization of water is 2257 kJ/kg³.
Here we have to apply the principles of vaporization to derive a formula to evaluate the energy needed to vaporize 0.32 kg of water,
Then
Energy = Heat of vaporization x Mass of water
Energy = 2257 kJ/kg x 0.32 kg
Energy = 722.24 kJ
Then, the energy needed to totally vaporize the water being heated is 722.24 kJ.
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India's employment situation is bad. While structural factors are responsible for the high unemployment rate, the current slowdown has made things worse. In order to improve the employment situation in India, there is a need to recast the present educational system towards implementation of scientific discoveries in daily life.
India's employment situation can improve with efforts in the field
India's employment situation can be improved by recasting the present educational system towards the implementation of scientific discoveries in daily life.
India's employment situation has been a concern for a long time now, and it is true that structural factors are responsible for the high unemployment rate.
However, the current slowdown has made things worse, and there is a need for urgent action to address the situation. One way to improve the employment situation in India is to recast the present educational system towards the implementation of scientific discoveries in daily life.
The implementation of scientific discoveries in daily life can help in the development of new industries and the growth of existing ones. This can create new jobs and lead to economic growth.
For example, the implementation of renewable energy technologies can create jobs in the manufacturing, installation, and maintenance of solar panels and wind turbines. Similarly, the implementation of biotechnology in agriculture can lead to the development of new crop varieties and the creation of jobs in the agricultural sector.
Furthermore, the implementation of scientific discoveries can also lead to the development of new products and services that can be exported. This can help in the growth of the economy and create new jobs in the process. For example, the development of new software products and services can create jobs in the IT sector.
In order to achieve this, there is a need to recast the present educational system in India. This can be done by emphasizing the teaching of science, technology, engineering, and mathematics (STEM) subjects.
Furthermore, there is a need to improve the quality of education in India by investing in research and development, and by promoting entrepreneurship and innovation. This can help in the creation of a knowledge-based economy that can create new jobs and lead to economic growth.
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what are the 3 concepts of rational choice theory?
paki explained po bawat Isa in your own idea po sana
pa help po
Answer:
Explanation:
The three concepts of rational choice theory are:
Self-interest: Individuals are rational and motivated by their own self-interest.Choice: Individuals make choices based on the available options and the expected costs and benefits of each option.Constraints: Individuals are constrained by various factors such as limited resources, time, and information, which affect their ability to make choices.One effective way to develop the "feeling" function in your personality is to
A. plan out a detailed schedule for each week.
B. ignore the consequences of your actions.
C. imagine how other people might feel in a situation.
D. spend more time alone.
The 'feeling' function in one's personality can be effectively developed through empathy, primarily by imagining how others might feel in various situations. This enhances one's ability to connect with others emotionally.
Explanation:One effective way to develop the 'feeling' function in your personality can be achieved through increased levels of empathy. The best choice among the provided options would be 'C. Imagine how other people might feel in a situation'. This behavior enables you to consider and understand circumstances from the perspectives of other people, thereby enhancing your capabilities to connect with them on an emotional level. It's important to note that this doesn't involve ignoring the consequences of your actions or spending more time alone. In contrast, it's about actively engaging in understanding and empathizing with others and their experiences.
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Particles q1= -66.3 μC, q2 = +108 μC, and q3 = -43.2 μC are in a line. Particles q1 and q2 are separated by 0.550 m and particles q2 and q3 are separated by 0.550 m. What is the net force on particle q2?
Remember:
Negative forces (-F) will point Left
Positive forces (+F) will point Right
Will mark brainliest IF answer is correct.
Refer to the attached images.
The force between two charged particles can be calculated using Coulomb's Law:
[tex]F = (k * |q1 * q2|) / r^2[/tex]
F is the force, k is Coulomb's constant (8.99 x 10^9 N m^2/C^2), q1 and q2 are the charges of the particles, and r is the separation distance between them.
For q1 and q2:
[tex]F1 = (k * |q1 * q2|) / r1^2\\= (8.99 x 10^9 N m^2/C^2) * (66.3 x 10^-{6} C) * (108 x 10^{-6 }C) / (0.550 m)^2[/tex]
For q2 and q3:
[tex]F2 = (k * |q2 * q3|) / r2^2\\= (8.99 x 10^9 N m^2/C^2) * (108 x 10^{-6} C) * (43.2 x 10^{-6} C) / (0.550 m)^2[/tex]
The net force on q2 is the vector sum of F1 and F2:
Net Force = F2 - F1
By calculating these values, we can determine the net force on particle q2.
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Electricity is supplied to a school along a cable of total resistance 0.5 ohms with the maximum current drawn from the mains as 100A. the maximum energy dissipated as heat for 1hrs is ?
Electricity is supplied to a school along a cable of total resistance 0.5 ohms with the maximum current drawn from the mains as 100A. the maximum energy dissipated as heat for 1hr is 18,000,000 Joules (J).
The following formula may be used to determine the maximum energy that was lost as heat during one hour:
Power x Time equals Energy
where authority is granted by
I2R = Power
where R denotes the overall resistance of the wire and I denotes the current flowing through it.
Given that the maximum current drawn from the mains is 100A and that the total resistance of the cable is 0.5 ohms, we may determine the power wasted as follows:
5000W is equal to (100A)2 times 0.5.
We must convert one hour to seconds in order to determine the amount of energy lost throughout that time. Since 3600 seconds make up 1 hour, we have:
Time = 3600s
Therefore, the amount of energy that was lost as heat in an hour is:
So the maximum energy dissipated as heat for 1 hour is 18,000,000 Joules (J).
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A t-shirt is launched at an angle of 63.6° at 25.8 m/s. The shirt is launched at a person in the stands a horizontal distance of 30.6 m away and 27.7 m above the ground. How many meters will the t-shirt be short of reaching the person?
The difference between the distance travelled by the t-shirt and the person's position is 3.07 m.
What is the time of motion of the t-shirt?The time of motion of the t-shirt is calculated as follows;
t = √ ( 2h / g )
where;
h is the height of the t-shirtg is acceleration due to gravityt = √ ( 2 x 27.7 / 9.8 )
t = 2.4 s
The maximum horizontal distance travelled by the t-shirt is calculated as follows;
d = Vₓt
where;
Vₓ is the horizontal velocityd = (25.8 m/s x cos(63.6) ) x 2.4 s
d = 27.53 m
The difference between the distance travelled by the t-shirt and the person's position is calculated as;
= 27.53 m - 30.6 m
= -3.07 m
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During the race competitors work against air resistance.
The work done against air resistance by the winner of the race was 3 360 000 J
Calculate the average air resistance acting on the winner of the race.
To calculate the average air resistance acting on the winner of the race, we need to use the formula:
Work = Force * Distance
In this case, the work done against air resistance is given as 3,360,000 J. However, we do not have the distance traveled or the time taken to complete the race.
Without knowing the distance or time, it is not possible to calculate the average air resistance. Additional information, such as the speed or any other relevant data, would be required to determine the average air resistance.
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Your question is incomplete, but your full question can be:
During the race competitors work against air resistance. The work done against air resistance by the winner of the race was 3,360,000 J. Calculate the average air resistance acting on the winner of the race.
Connecting Clauses with Colons and Semicolons
Quaynisha Perry's strategy was interesting: ask everyone in the room to be part of the decision-making process.
The statement has been corrected of the capitalization error.
What is capitalization error?
Capitalization errors is said to take place when the writer capitalizes a word that does not require a capital letter or when the writer does not capitalize a word the requires one.
In all cases, Capitalization errors hinder the reader's experience with the writing and must be avoided at all cost.
It is pertinent to note that you should always capitalize the first letter of the first word in a sentence, no matter what the word is.
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Why do diving seabirds need to account for the bending of light?
h. How is a schematic diagram drawn? What should we be aware of while drawing them?
To draw a schematic diagram effectively, there are several key points to consider. First, it is important to understand the system or circuit you are trying to represent. Second, organize the diagram in a logical and readable manner. Third, maintain clarity and simplicity in the diagram. Lastly, follow standard practices and guidelines for drawing schematic diagrams. We should be aware of while drawing them because for understanding the system.
A schematic diagram is a graphical representation that depicts the electrical connections and components of a system. It is commonly used in various fields such as electronics, electrical engineering, and industrial automation. To draw a schematic diagram effectively, there are several key points to consider.
Firstly, it is important to understand the system or circuit you are trying to represent. Analyze the components and their relationships, and determine the appropriate symbols to represent each component accurately. Use standard symbols and conventions to ensure consistency and easy interpretation by others.
Secondly, organize the diagram in a logical and readable manner. Arrange components and connections in a way that reflects their physical arrangement or the flow of signals. Use clear and concise labeling to identify each component and connection point.
Thirdly, maintain clarity and simplicity in the diagram. Avoid cluttering the diagram with unnecessary details. Focus on the key elements and connections that are essential for understanding the system.
Lastly, follow standard practices and guidelines for drawing schematic diagrams. This includes using consistent wire and connection symbols, labeling voltage and current values, and providing necessary annotations or notes for clarification.
Drawing a schematic diagram requires a good understanding of the system, adherence to standard symbols and conventions, logical organization, and clarity. By following these guidelines, you can create schematic diagrams that effectively convey the desired information. Remember, practice and attention to detail are essential for improving your schematic diagram drawing skills.
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Question
Tina set a goal to run a 5k race, so she set a mileage goal each week. She
became more and more confident that she would be able to finish the race.
This is an example of which of the following?
OA Physiological states
OB. Verbal persuasion
C. Performance accomplishments
OD. Vicarious experience
SUBMIT
The example provided is most closely related to option C: Performance accomplishments.
Setting a mileage goal each week and becoming more confident about finishing the race indicates that Tina is actively working towards her goal of running a 5k race. By gradually increasing her mileage and gaining confidence, she is achieving performance accomplishments, which involve personal achievements and successful experiences.
Physiological states refer to the influence of one's physical and emotional condition on their confidence and motivation. Verbal persuasion involves receiving encouragement or positive feedback from others. Vicarious experience entails gaining confidence by observing and learning from others' successes.
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Discuss the consequences of poor health and safety when using non-ionising and ionising radiation technologies and the prevention and safety measures employed.
Poor health and safety practices when using non-ionizing and ionizing radiation technologies can have significant consequences. Here are some potential consequences and the prevention and safety measures employed to mitigate them.
Consequences of poor health and safety:
Non-Ionizing Radiation:
Thermal Effects: Prolonged exposure to high levels of non-ionizing radiation, such as from radiofrequency waves (RF) or microwaves, can lead to thermal effects, including tissue heating and burns.Ionizing Radiation:
Acute Radiation Syndrome (ARS): High doses of ionizing radiation, such as those experienced during a nuclear accident or radiation therapy accidents, can lead to ARS, which includes symptoms like nausea, vomiting, fatigue, and potentially fatal damage to vital organs.Prevention and safety measures:
Non-Ionizing Radiation:
Time, Distance, and Shielding: Minimize exposure time to non-ionizing radiation sources, maintain a safe distance from the source, and use shielding materials (e.g., lead aprons, and protective barriers) to reduce exposure.Compliance with Guidelines: Follow national and international guidelines and regulations regarding safe exposure limits for different types of non-ionizing radiation sources. For example, adherence to specific absorption rate (SAR) limits for mobile devices.Ionizing Radiation:
Risk Assessment and Minimization: Conduct thorough risk assessments to identify potential hazards, establish safety protocols, and minimize radiation exposure through engineering controls and administrative measures.Personal Protective Equipment (PPE): Use appropriate PPE, such as lead aprons, gloves, and goggles, to protect against direct radiation exposure.Training and Education: Provide comprehensive training and education to workers who handle ionizing radiation sources to ensure they are aware of the risks, safety protocols, and proper handling procedures.Monitoring and Dosimetry: Regularly monitor radiation levels in the workplace and ensure that employees wear dosimeters to measure their radiation exposure.Regulatory Compliance: Adhere to applicable regulations and standards, such as those set by radiation protection agencies and authorities, to ensure compliance with safety measures and limits on radiation exposure.know more about ionizing radiation here:
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A piece of lead of mass 500 g and at air temperature falls from a height of 25 m. (a) What is its initial gravitational potential energy? (b) What is its kinetic energy on reaching the ground (assume g=10 ms-2)? (c) Assuming that all of the energy becomes transferred to internal energy in the lead when it hits the ground, calculate the rise in temperature of the lead. (d) State the energy transfers that have occurred from the moment the lead strikes the ground until it has cooled to air temperature again
Answer:
(a) The initial gravitational potential energy of the lead can be calculated using the formula:
E = mgh
where E is the potential energy, m is the mass, g is the acceleration due to gravity, and h is the height. Substituting the given values, we get:
E = (0.5 kg) × 10 m/s² × 25 m = 125 J
Therefore, the initial gravitational potential energy of the lead is 125 J.
(b) When the lead reaches the ground, all of its potential energy is converted into kinetic energy. The kinetic energy can be calculated using the formula:
E = (1/2)mv²
where E is the kinetic energy, m is the mass, and v is the velocity. At the moment of impact, the lead has a velocity of:
v = √(2gh) = √(2 × 10 m/s² × 25 m) = 10 m/s
Substituting the given values, we get:
E = (1/2) × 0.5 kg × (10 m/s)² = 25 J
Therefore, the kinetic energy of the lead on reaching the ground is 25 J.
(c) The energy gained by the lead due to the impact is converted into internal energy, which raises the temperature of the lead. The amount of energy required to raise the temperature of the lead can be calculated using the specific heat capacity formula:
Q = mcΔT
where Q is the energy gained, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. The specific heat capacity of lead is 128 J/kg°C. Substituting the given values, we get:
125 J - 25 J = (0.5 kg) × 128 J/kg°C × ΔT
ΔT = (100 J) / (64 J/kg°C) = 1.56°C
Therefore, the rise in temperature of the lead is 1.56°C.
(d) The energy transfers that have occurred from the moment the lead strikes the ground until it has cooled to air temperature again are:
Conversion of potential energy to kinetic energy upon impact
Conversion of kinetic energy to internal energy upon impact, raising the temperature of the lead
Transfer of heat energy from the lead to the surrounding air, as the lead cools down to air temperature
Particles q1= -66.3 μC, q2 = +108 μC, and q3 = -43.2 μC are in a line. Particles q1 and q2 are separated by 0.550 m and particles q2 and q3 are separated by 0.550 m. What is the net force on particle q2?
Remember:
Negative forces (-F) will point Left
Positive forces (+F) will point Right
Will mark brainliest IF answer is correct.
To calculate the net force on particle q2, we need to calculate the individual forces exerted by q1 and q3 on q2, considering their charges and separation distances.
Using Coulomb's Law, the force between two charged particles can be calculated as:
[tex]F = (k * |q1 * q2|) / r^2[/tex]
where F is the force, k is Coulomb's constant (8.99 x 10^9 N m²/C²), q1 and q2 are the charges of the particles, and r is the separation distance between them.
For q1 and q2:
F1 = (8.99 x 10^9 N m²/C²) * (|-66.3 x 10^-6 C * 108 x 10^-6 C|) / (0.550 m)²
For q2 and q3:
F2 = (8.99 x 10^9 N m²/C²) * (|108 x 10^-6 C * -43.2 x 10^-6 C|) / (0.550 m)²
The net force on q2 is the vector sum of F1 and F2:
Net Force = F1 + F2
By calculating these values and performing the addition, we can determine the net force acting on particle q2.
Therefore, To calculate the net force on particle q2, we need to calculate the individual forces exerted by q1 and q3 on q2, considering their charges and separation distances.
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The unit for work is the
a. Calories
b. Celsius degrees
c. Kilogram
d. Joules
(3.1.4)
The work done is the amount of energy transferred by the force to move an object. Work done equals the product of force and displacement. It is the scalar quantity.
Work done, W = F.d, where F is the force and d is the displacement of the object. The unit of work done is N/m or joule. Hence, the unit of work done is the joule. Thus, the correct option is option D.
Energy is defined as the ability to do work. Energy is of two types and they are potential and kinetic energy. Potential energy is the energy possessed by the object when the object is at rest and the kinetic energy is the energy possessed by the object when it is in motion.
Thus, the kinetic energy is maximum at X and Z. Thus, the ideal solutions are options B and D. The potential energy is maximum at W. Hence, the correct option is A.
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