Both the force of "Hand on the book" and the force of "Earth on the book" are directed upward. The ground and the book are being drawn in toward the hand. As a result, the forces pulling on the hands are "Book on hand" and "Earth on hand."
Gravity, usually referred to as gravitation, is the unchanging force of attraction that binds everything together in physics. Being the weakest known force in nature, it has minimal effect on defining the inherent properties of everyday objects.
The force "Hand on the book" is directed upward, and the force "Earth on the book" is directed downward. The hand is being pulled toward the book and the earth.
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two charged ping-pong balls separated by a distance of 1.53 m exert an electric force of 0.0174 n on each other. what will be the force if the objects are brought closer, to a separation of only 29.7 cm?
If the particles are closely connected, to a distance of only 29.7 cm, the force is equal to 1.024N.
Describe a force.Force is indeed a necessary attribute that alters or has the potential to alter an object's posture of rest as well as motion as well as its shape.
What kinds of forces are there?These are the kinds of forces that occur when two objects come into contact with one another physically. There are several different kinds of contact forces, including friction, tensions, normal force, acting on an object force, applied force, and spring force.
Coulomb's law F = kQ1Q2/d^2
kQ1Q2 = Fxr^2
Substituting,
kQ1Q2 = 0.0174N x (1.53m)^2
kQ1Q2 =0.0532
29.7cm = 0.297 m
F = kQ1Q2/d^2
= 0.059/(0.297)^2
F = 1.024N
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extra for experts: what are the main differences between bill nye's solar system model and the second life model? what about other models like what if the moon was 1 pixel or the scale of the universe?
(1) The primary different between Bill Nye's solar system model and the Second Life Model is the use of a realistic scale to depict the relative sizes and separations of the planets in Bill Nye's model.
(2) A project by designer and artist Josh Worth serves as an example. Its name, "If the moon were only one pixel," accurately describes what it does. The moon (3474.8 km) occupies the entire pixel, and the rest of the solar system is scaled down to fit. It turns out that most of the time, space is just that—space.
All of the planets in Bill Nye's model are in a straight line, and it's quite realistic. Although Bill Nye's scale is more precise than this one, the second life model demonstrates how the planets orbit the sun, the spin of their axes, and other things. However, this model is not fully accurate.
"If the Moon Were 1 Pixel" is an infographic by designer Josh Worth. The interactive infographic precisely measures out our solar system using pixels and lets users scroll around space as if they were a spacecraft pushing its boundaries.
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PLEASE HELP ME WITH THIS I HAVE NO IDEA HOW TO DO THE PROBLEM SOLVINGGG. also please put in answer and how to do it :)
a volleyball player hits a ball straight up with an initial velocity of 7.92 m/s. if another player hits the ball as it comes down at the same height, what is the final velocity of the volleyball?
explain what would happen to motion of your mousetrap car if you had wound the string around the back axle of the car forwards instead of backwards make sure you use netwons 3rd law to quantify and qualify your response
If the string was wound around the back axle of mousetrap car forwards instead of backward, the car would not move.
What do you mean by motion?Motion is the change in a body's orientation or position over time. Every single thing in the universe is constantly in motion, including humans and animals.
This is because Newton's Third Law states that for every action, there is an equal and opposite reaction. In the case of a mousetrap car, the action is the force exerted by the string on the back axle as it unwinds, and the reaction is the force exerted by the back axle on the string, propelling the car forward.
If the string is wound around the axle forwards, the direction of the force exerted by the string on the axle will be opposite to the direction of motion, canceling out the propelling force and preventing the car from moving.
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a flute acts like a double open-ended pipe and sounds a note with a fundamental frequency of 310 hz pitch. what is the second harmonic frequency of this pitch?
The second harmonic frequency of this pitch is 620 Hz.
What is frequency?Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency for clarity and is distinct from angular frequency.
Frequency is measured in hertz (Hz) which is equal to one event per second.
The fundamental frequency of a pipe is determined by the length of the pipe. The frequency of the second harmonic, also known as the first overtone, is twice the fundamental frequency.
So, if the fundamental frequency of the flute is 310 Hz, the second harmonic frequency would be 2 * 310 Hz = 620 Hz.
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1. technology required. ramps in a parking garage need to be both steep and safe. the maximum safe incline for a ramp is 8.5 degrees. is this ramp safe? if not, provide dimensions that would make the ramp safe
The ramp is not safe. Making the height up to 14.25 will make the ramp safe.
Given:
Incline angle = 85.5 degrees
Let's assume the steep angle is α. For a safe ramp, the angle should be:
Tanα = 15/95
Tanα = 3/19
Tanα = 0.158
α = Tan⁻¹(0.158)
α = 8.98°
Since the given angle is less than a steep angle,
8.98° > 8.5°
Hence, the ramp is not safe.
Dimensions for ramp to be safe:
Tan (8.5) = 0.15
Making the height up to 14.25 will make the ramp safe.
Hence, the ramp is not safe. Making the height up to 14.25 will make the ramp safe.
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a car accelerates uniformly from rest and reaches a speed of 20 m/s in 9.3 s. the diameter of a tire is 31.4 cm. find the number of revolutions the tire makes during this motion, assuming no slipping. answer in units of rev.
The number of revolutions the tire makes during this motion is 94 revolutions.
What is the distance travelled by the tire?
The distance travelled by the tire is calculated by applying the following kinematic equation.
s = [ ( u + v ) / 2 ] x t
where;
u is the initial velocity of the carv is the final velocity of the cart is the time of motion of the cars = [( 0 + 20 ) / 2 ] x 9.3
s = 93 m
The number of revolutions of the tire is calculated as follows;
1 rev = 2πr
where;
r is the radius of the tire = 31.4 cm / 2 = 15.7 cm = 0.157 mN (2πr) = 93 m
N = 93 / 2πr
N = (93) / ( 2π x 0.157)
N = 94 revolutions
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the spacecraft is using xenon as the propellant for the maneuver in the previous question. how would you size the tank?
the spacecraft is using xenon with a total spacecraft mass of 5 kg assumed. This simple formulation captured the interaction between propellant pressure and propellant tank volume.
A propellant (or propellent) is a mass that is expelled or expanded in order to produce a thrust or other motive force in accordance with Newton's third law of motion and "propel" a vehicle, projectile, or fluid payload. A reaction engine is the engine that expels the propellant in a vehicle. Although a propellant is technically the reaction mass used to generate thrust, the term "propellant" is commonly used to describe a substance that contains both the reaction mass and the fuel that stores the energy used to accelerate the reaction mass. For example, in chemical rocket design, the term "propellant" is frequently used to describe a combined fuel/propellant, although propellants should not be confused with fuel.
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A box is made from a piece of card measuring 6 cm by 9 cm with squares of side x cm out of the corners. Use Desmos to find find the maximum volume.
The maximum volume of the box is 24 cm^3 when the side length of the corner squares is x = 3/2 cm.
What is volume?
Volume is a measure of the amount of space occupied by a three-dimensional object. It is a scalar quantity and it has units of length cubed, such as cubic meters (m³), cubic centimeters (cm³) or cubic inches (in³). The volume of an object can be calculated by multiplying its three dimensions: length, width, and height (or depth).
To find the maximum volume of the box, we can use calculus to find the critical points of the volume function.
First, we need to express the volume of the box in terms of the side length x. The volume of the box can be found by subtracting the volume of the four corner cubes from the volume of the entire card.
The volume of the entire card is 69x and the volume of each corner cube is x^3.
Therefore,
V = (69x) - 4(x^3)
Now, we can use the first derivative test to find the critical points of the volume function.
dV/dx = 54x - 12x^3
Setting dV/dx equal to zero and solving for x, we get x = 3/2.
Now, we can substitute this value of x back into the volume function and find the maximum volume of the box.
V = (69(3/2)) - 4((3/2)^3) = 27 - 4(27/8) = 27 - 3 = 24
Therefore, the maximum volume of the box is 24 cm^3 when the side length of the corner squares is x = 3/2 cm.
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impulse [im-puhls] [L] n. 1. the influence of a certain mood 2. a sudden urge or desire 3. a driving force caused by forward movement 4. Mechanics. a measure of momentum 5. Physiology. a wave of energy that travels along a nerve to create or stop movement 6. Electricity. a solitary, sudden flow of current in a single direction What is the meaning of impulse as it is used in the sentence below
Impulse refers to the measure of momentum.
What is impulse?
Impulse is a measure of the change in momentum of an object, and it is given by the product of force and time for which the force is applied. Mathematically, impulse is represented as the integral of force with respect to time. The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object. This means that the impulse is equal to the final momentum minus the initial momentum of the object.
As used in the sentence "The impulse applied to the ball by the racket can be calculated using the impulse-momentum theorem," impulse refers to the fourth meaning of the word as described in your question.
Specifically, it refers to a measure of momentum, which is the product of an object's mass and velocity. In this context, impulse is a vector quantity that is equal to the change in momentum of an object resulting from a force applied over a certain period of time.
The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object, and it is used in mechanics to calculate the effect of forces on moving objects.
Hence, Impulse refers to the measure of momentum.
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a parallel plate capacitor is charged up by a battery. the battery is then disconnected, but the charge remains on the plates. the plates are then pulled apart. explain whether each of the following quantities increases, decreases, or remains the same as the distance between the plates increases. explain your reasoning for each. cj7 19.cq.017 (a) the capacitance of the capacitor (b) the potential difference between the plates (c) the electric field between the plates (d) the electric potential energy stored by the capacitor
This is because capacitance is defined as the ratio of the charge on the plates to the potential difference between them (C = Q / V), and, the potential difference between them remains the same.
(b) the potential difference between the plates,The potential difference between the plates remains the same as the distance between the plates increases. This is because the potential difference between the plates is determined by the battery and not affected by the distance between the plates.
(c) the electric field between the plates (d) the electric potential energy stored by the capacitor(c) The electric field between the plates decreases as the distance between the plates increases. This is because the electric field is the force per unit charge, and it is inversely proportional to the distance between the plates. As the distance between the plates increases, the electric field decreases.
(d) The electric potential energy stored by the capacitor decreases as the distance between the plates increases. This is because the electric potential energy stored by the capacitor is given by the equation U = 1/2 * C * V^2, and as the distance between the plates increases, the capacitance decreases and the potential difference remains the same. Therefore, the electric potential energy stored by the capacitor decreases.
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An electron with an initial speed of 5.00×105 m/s is brought to rest by an electric field.Did the electron move into a region of higher potential or lower potential?What was the potential difference that stopped the electron?What was the initial kinetic energy of the electron, in electron volts?
Potential difference of electron which is moving with speed of 5.00×105 m/s is 0.7109 V and Initial kinetic energy is 11.375 × 10∧-20 eV
What does "potential difference" actually mean?Potential difference, also known as the external effort required to move a charge from one position to another in an electric field, is said to be the difference with in energy which electric charges have between 2 points in a circuit. Volts are used to measure it. Voltage is another name for potential difference (Pd. ), which is measured in volts (V).
Given -
Speed of electron = 5.00×105 m/s
We know that
K.E = e × V
Potential difference = K.E / e
= 11.375 × 10∧-20 / 1.6 × 10∧-19
= 0.7109 V
Initial kinetic energy = 1/2 ×m × v²
= 1/2 × 9.1×10∧-31 × (5×10∧5)∧2
= 11.375 × 10∧-20 eV
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Are there components of the velocity that are not determined by the measurement of the force? Constants A particle with charge 5.60 nC is moving in a uniform magnetic field B = 1.26 T )k The magnetic force on the particle is measured to be F = 3.60*10 - N)i+ 7.60*10"= N)j: yes Submit Request Answer Part B This question will be shown after you complete previous question(s): Part C This question will be shown after you complete previous question(s). Part D Calculate the scalar product U AZd B3 U . F = m/s . N Submit Request Answer Part E What is the angle between U and Give your answer in degrees AZd'
Yes, there are components of the velocity that are not determined by the measurement of the force.
What is velocity?
Velocity is a vector quantity that describes the rate of change of an object's position in a specific direction. It is defined as the displacement (change in position) of an object per unit time. The units of velocity are typically meters per second (m/s) or kilometers per hour (km/h). Velocity can also be represented by a vector arrow pointing in the direction of motion, with the magnitude of the arrow representing the speed of the object.
Yes, there are components of the velocity that are not determined by the measurement of the force. This is because the force experienced by a charged particle in a magnetic field is perpendicular to the velocity of the particle. So, the force measurement only provides information about the component of the velocity that is perpendicular to the direction of the magnetic field. The other component(s) of velocity, which is parallel to the magnetic field, cannot be determined from the force measurement alone.
To calculate the scalar product U dot B, you would need to know the velocity vector U. Without this information, it is not possible to calculate the scalar product.
The angle between U and B can be calculated using the formula:
theta = acos((U dot B) / (|U| x |B|))
where theta is the angle in degrees, U dot B is the dot product of the vectors U and B, and |U| and |B| are the magnitudes of the vectors U and B respectively.
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A string pulls horizontally on a cart so that it moves at increasing speed along a smooth, frictionless, horizontal surface. When the cart is moving medium-fast, the pulling is stopped abruptly. (a) Describe in words what happens to the cart's motion when the pulling stops. (b) Illustrate your description with motion diagrams, force diagrams, and position-versus-time and velocity-versus-time graphs. Indicate on the graphs when the pulling stopped. What assumptions did you make?
a) We are assuming that the surface is frictionless, so when the pulling stops, the cart will continue to move at a constant speed in a straight line.
b) Illustration of description with motion diagrams, force diagrams, and position-versus-time and velocity-versus-time graphs is given in the attachment.
What is frictionless surface?From Galileo Galilei's writings comes the idea of the frictionless surface. A formula for predicting the motion of an object moving down an inclined plane was provided by Galileo in his 1638 book The Two New Sciences. His formula was based on earlier work he had done with bodies that were falling freely.
Although his model was based on conceptual modelling of the forces acting upon the object, it was not based on experiments with objects moving down an inclined plane. Galileo understood the mechanics of the inclined plane as the union of the horizontal and vertical vectors; the outcome of gravity acting upon the object, diverted by the slope of the plane.
The cart accelerates until the pulling stops, at which point it will move at a constant speed(see attachment). Because of the constant acceleration that causes the velocity to increase with time, the first part of the function is a straight inclined line. The second part is a straight horizontal line because the cart moves at a constant velocity after the pulling stops because there are no horizontal forces acting on it.
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you and a friend launch waves at opposited ends of the stretched string after class. you shake the string at 5 hz with a 15 cm amplitude, and your mellow friend shakes the other end at 2 hz with a 10 cm amplitude. what is the largest (most positive) displacement in cm of the string at any point at any time?
The highest and most positive movement of the string, in cm, is always 25 cm.
What, exactly, is displacement?A transition in an object's motion is referred to as displacement. It has a magnitude and the direction and is a vector quantity. An arrow going from the starting point to the finishing point serves as its symbol .An object's position changes, for example, if it moves from position A to position B.
What are displacement and velocity?Displacement is the vector shift between an object's starting and ending coordinates. It's possible that the distance this same thing has traveled is significantly different from that. Velocity is the rate at which displacement changes over time
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A + 10 nC charge is located at the origin.
part A: What is the strength of the electric field at the position (x,y)=(5.0cm,0cm)?
Part B: What is the strength of the electric field at the position (x,y)=(−5.0cm,5.0cm)?
Part C: What is the strength of the electric field at the position (x,y)=(−5.0cm,−5.0cm)?
A)The strength of the electric field at the position (x,y)=(5.0cm,0cm) is [tex]3.6*10^{4}[/tex] N/C
B)The strength of the electric field at the position (x,y)=(−5.0cm,5.0cm) is [tex]1.78*10^4[/tex] N/C
C) The strength of the electric field at the position (x,y)=(−5.0cm,−5.0cm) is [tex]1.78*10^4[/tex] N/C
A)To determine the field strength at point A where (x,y)=(5.0cm,0.0cm),
notice that the distance from A to the origin is simply 5.0 units along the y-axis.
[tex]E=1/4\pi e_{o}*\frac{Q}{r^{2}}[/tex]
[tex]E=9*10^{9}*\frac{10*10^{-9}}{{5*10^{-2}}^{2}}[/tex]
[tex]E=3.6*10^{4}[/tex]N/C
B)To determine the field strength at point A where (x,y)=(-5.0cm,5.0cm),
use Pythagoras theorem,
[tex]r=\sqrt{5^2+5^2} \\r=7.1cm[/tex]
[tex]E=1/4\pi e_{o}*\frac{Q}{r^{2}}[/tex]
[tex]E=9*10^{9}*\frac{10*10^{-9}}{{7.1*10^{-2}}^{2}}[/tex]
[tex]E=1.78*10^4[/tex] N/C
C)To determine the field strength at point A where (x,y)=(-5.0cm,-5.0cm),
use Pythagoras theorem,
[tex]r=\sqrt{5^2+5^2} \\r=7.1cm[/tex]
[tex]E=1/4\pi e_{o}*\frac{Q}{r^{2}}[/tex]
[tex]E=9*10^{9}*\frac{10*10^{-9}}{{7.1*10^{-2}}^{2}}[/tex]
[tex]E=1.78*10^4[/tex] N/C
What is electric field strength?
Electric field strength is a quantitative expression of the intensity of an electric field at a particular location. The standard unit is the volt per meter (V/m or V·m-1). A field strength of 1 V/m represents a potential difference of 1 V between points separated by 1 meter.
How to measure electric field strength?
F=(k·Q·q)/d2
In this case, F again represents force, k equals the coulomb constant, Q refers to the source charge (in coulombs), q is the test charge (in coulombs) and d is the distance between Q and q.
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if the pressure is doubles and the temperature is held constant what will happen to the volume of a gas?
The volume of a gas will decrease by half if the pressure is doubled while the temperature remains unchanged.
Boyle's Rule
The volume is inversely proportional to the pressure for a fixed mass of gas at a constant temperature.
That implies that, for instance, doubling the pressure will result in halving the volume. The volume will decrease ten times as quickly as the pressure does.
This can be mathematically stated as pV = constant.
The number of moles, n, remains constant since the mass of the gas is fixed.
The gas constant, R, is a constant that never changes.
The constant state of the temperature is required by Boyle's Law.
Boyle's Law, which we just stated is a result of, states that everything on the right-hand side of the equation pV = nRT is constant, and as a result, pV is constant.
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What can one say about the image produced by a thin lens that produces a positive magnification?
a. It is real and inverted
b. It is real and erect.
c.It is virtual and inverted.
d. It is virtual and erect.
The answer to this question depends on the type of thin lens being discussed and the position of the object.
What is magnification?Magnification is the process of enlarging an object or image beyond its normal size. Through magnification, objects can be seen with greater clarity and detail. It is often used in microscopes, telescopes, and magnifying glasses to allow for close examination of an object or image. Magnification can also be used to change the size of an image or object for a variety of applications.
Generally speaking, a thin lens that produces a positive magnification will produce an image that is real and inverted. This means that the image will be the same size as the object but will be inverted. This is because the rays of light being refracted by the lens are converging towards the same point and thus producing an image which is behind the lens and on the same side as the object. If the object is placed on the other side of the lens, this will result in a virtual and erect image.
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The image produced by a thin lens that produces a positive magnification is real and inverted. So correct option is a.
What do you mean by positive magnification?Positive magnification refers to the increase in size of an image produced by an optical system, such as a microscope or telescope. A positive magnification means that the image is larger than the object being viewed. A magnification of "x10" means that the image is ten times larger than the object being viewed.
A thin lens that produces a positive magnification will produce a real and inverted image.
When a lens has a positive magnification, it means that the image is larger than the object, and the image is on the same side of the lens as the object. Since the image is real, it means that it is formed by the actual convergence of light rays, and it can be projected on a screen. And since the image is inverted, it means that it is upside-down with respect to the object.
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the height of the mercury column in a barometer reads 725 mm. how will the height of the mercury column change when the atmospheric pressure decreases?
The height of mercury in the tube decreases when the atmospheric pressure decreases. Since, pressure s directly proportional to height change in barometer.
What connection exists between height and atmospheric pressure?Since the two are inversely related, air pressure lowers as elevation rises. This is a result of the volume of air that is now surrounding you at your elevation. There is more air above you and therefore more pressure when you are at a lower level.
What are the uses of a barometer?An instrument known as a barometer is used to measure atmospheric pressure, also known as barometric pressure. The air layers that surround Earth are known as the atmosphere. As gravity drags that air to Earth, it exerts pressure on everything it touches. This pressure is measured using barometers.
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Using Kirchhoff's junction rule, determine which one of the following four diagrams would be the appropriate one to use for solving this problem.
Among the four given diagrams, the fourth one (d) is observed to be correct one used to solve the problem.
The true direction of an unknown current or emf is frequently unknown in advance, but this is irrelevant. Your calculations will produce a result with a negative sign if the actual direction of a given quantity differs from your assumption.
The conservation of charge is used to apply Kirchhoff's first rule to a junction. Charge is conserved, and current is the flow of charge. So, whatever charge flows into the junction must flow out. It is also known as junction law.
The question is incomplete. The complete question has four different diagrams in the attachment below.
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Referring to the POWER trendline equation from analysis step 2, what mathematical relationship exists between the wave speed and the density of the medium.
The mathematical relationship exists between the wave speed and the density of the medium is that the density of the medium is inversely proportional to the wave speed.
What is wave speed?The amount of space a wave covers in a certain amount of time, such as the number of meters it covers in a second, is known as its wave speed. The following equation relates wave speed to both wave frequency and wavelength: Wavelength x Frequency = Speed.
Since sound is a mechanical wave, it moves through a medium by being compressed and rarefied. In an elastic medium, its velocity is proportional to the square root of the tension present. More elasticity in the medium results from higher density, which also increases the ease with which compression and rarefaction can occur. In this manner, the density increases while the sound velocity increases.
As a result, the square root of the medium's density and the velocity of sound in that medium are inversely related.
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The two ropes seen in FIGURE are used to lower a 255 kg piano 5.00 m from a second-story window to the ground. How much work is done by each of the three forces?
The work is done by each of the ropes and gravity are 6375 Joules and 12750 Joules respectively during lowering the piano.
The mass of piano that has to be lift up is 255 kg.
The ropes has to lower the piano till height of 5 M from a second story window to the ground.
The work done during lowering the piano should be,
W = MgH
W is work done,
M is the mass,
g is the gravitational acceleration,
H is the height.
Putting values,
W = 255×10×5
W = 12750 Joules.
The work done by each rope will be 6375 Joules.
The work done by gravitation force will be 12750 Joules.
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four students are discussing the kind of energy that's fundamental to life on earth. thomas says it's electrical energy. susan opts for solar energy. lawrence argues in favor of chemical energy. kimberly is sure it's mechanical energy. who is correct? thomas susan lawrence kimberly
Susan is the correct answer. Susan opts for solar energy when they are discussing the kind of energy that's fundamental to life on earth.
What is solar power and how is it used?Solar energy systems either use photovoltaic (PV) panels or mirrors to focus solar radiation to convert sunlight into electrical energy. This power can be converted into electricity, or it can be stored thermally or in batteries.
Why is solar energy crucial?Clean energy comes from the sun.
When you generate power with solar panels, no greenhouse gas emissions are put into the atmosphere. Solar energy is a key energy source in the transition to the creation of clean energy since the sun produces more energy than humans could ever require.
What advantages does solar have?Each kilowatt-hour (kWh) of solar energy produced would significantly lower the emissions of harmful pollutants including sulfur oxides, nitrogen oxides, and particulate matter as well as greenhouse gases like CO2. Solar sunlight decreases water withdrawal and use.
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In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 m/s^2. Ignore air resistance. Part AA flea jumps straight up to a maximum height of 0.460 m. What is its initial velocity v0 as it leaves the ground?Express your answer in meters per second to three significant figures.Part BHow long is the flea in the air from the time it jumps to the time it hits the ground? Express your answer in seconds to three significant figures.
The initial velocity of jumping flea as it leaves the ground is 2.65[tex]\frac{m}{s}[/tex] and the time that it hits the ground is 0.542s.
The flea jumps with some initial momentum and ascends to its highest point under the influence of gravity.
The Newton's equations of motion can be used to calculate the flea's initial velocity.
By changing the initial velocity value in Newton's equation of motion, it is possible to calculate how long it takes a flea to reach its maximum height.
The time it takes a flea to go to the ground will be twice as long as the time it takes to get to its highest point.
The relationship between velocity, distance, and time of a motion with constant acceleration is described by Newton's equations of motion. The following are the three motion equations:
[tex]y-y_{o}=ut+\frac{1}{2}at^{2}[/tex]
Now putting the values of all variables find the initial velocity u
u=[tex]\sqrt{2(9.8)(0.360)}[/tex]
On solving we get,
u=2.65[tex]\frac{m}{s}[/tex].
Now using,
v=u+at
find the value of t
t=[tex]\frac{0-2.65}{-9.8}[/tex]
t=0.271s
and as the actual time is double of this time
So, time is 0.542s.
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a current of 4.2a passes through a heater with a p.d. of 14v across it. what is the resistance of the heater?
According to the question the resistance of the heater is 3.33 Ω.
What does the term "resistance" mean?The ohm, frequently written as a word and sometimes represented by the capital Greek letter omega, is the unit of resistance that is typically used.The resistance of a line is directly proportional to its diameter if the temperature and many other physical factors remain constant. It indicates that if the length increases, the resistance does too; conversely, if the length decreases, the resistance also decreases.
as we know that,
V = IR
I = 4.2A
V= 14 v
R = V/I
= 14/4.2
= 3.33 Ω
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A fan blade rotates with angular velocity given by ωz(t)= γ − β t2, where γ = 4.65 rad/s andβ = 0.775 rad/s3 .
Calculate the angular acceleration as a function of time.
Calculate the instantaneous angular acceleration αz at t0 = 2.7 s .
Calculate the average angular acceleration αav−z for the time interval t=0 to t0 = 2.7 s
The angular acceleration as a function of time is found to be -2βt.
The instantaneous angular acceleration is found to be -4.18rad/s².
The average angular acceleration is found to be -2.09rad/s².
What is average angular acceleration?The ratio of the change in angular velocity to the time it takes for the object to experience the change is known as the average angular acceleration, or avg., of an object. The limit of the average angular acceleration as time approaches zero is known as the instantaneous angular acceleration.
Given:
a)w = z(t)= γ − β×t²
By separating the two sides in terms of t, we obtain
α = z(t) = -2βt
b)Given: γ = 4.65rad/s and β = 0.775 rad/s³
so, For t = 2.7 sec,
angular acceleration = -2 × 0.775× 2.7 = -4.18rad/s.
c) average angular acceleration α avg = ΔW₂(t)/Δt
α avg = W₂ ×2.7 - W₂ ×0/2.7-0
α avg = γ - β(2.7)² - [γ - β(0)²]
α avg = -β (2.7)²/2.7
α avg = β (2.7)
α avg = 0.775 (2.7)
α avg = -2.09rad/s².
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1.calculate the resultant velocity of freda flyer who normally flies at 100 km/h and then encounters a 10 km/h headwind (a wind coming from ahead).
The resultant velocity of Freda flyer would be 90 km/h. A sector's headwind may become its tailwind, and conversely.
What are flying tailwinds?Tailwind is wind blowing from behind the aircraft. It reduces the lift and aircraft generally avoid taking off or landing in tailwind. A tailwind is wind that is blowing toward the back of the plane. Aircraft often stop taking off or flying in headwinds because it lowers lift. Aside from this, airplanes like tailwinds since they propel planes faster, which saves time and fuel. Crosswind is defined as wind blowing from an aircraft's side.
Is Tailwind an useful resource?Tailwinds are elements and situations that contribute to growth or have favorable effects on earnings and sales. Headwinds are elements or occurrences that hinder growth or have a negative impact on revenues and revenue.
This can be calculated by subtracting the headwind velocity (10 km/h) from the original velocity (100 km/h).
Resultant velocity = Original velocity - Headwind velocity
Resultant velocity = 100 km/h - 10 km/h = 90 km/h
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The distance between two objects is increased by 3 times the original distance. How will this change the force of attraction between the two
objects?
ОА.
The new force will be of the original.
3
OB.
The new force will be 3 times more than the original.
OC.
1
The new force will be- of the original.
OD.
The new force will be 9 times more than the original.
OB. The new force will be 3 times more than the original. If the distance between the two objects is increased by a factor of 3, the distance between the two objects is increased by 3 times the original distance.
The inverse square law, which states that the force of attraction between two items is inversely proportional to the square of their distance, governs the interaction between two objects. This implies that the power of attraction between the two items weakens as their distance grows. In this case, there is a three-fold increase in the separation between the two items. The inverse square law states that the force of attraction between two objects will drop by a factor of nine if their separation grows by a factor of three. The formula for this is force = k/d2, where d is the separation between the two objects and k is a constant.
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Please help thank you so much!!
Answer:
Below
Explanation:
CO2 buildup during exercise stimulates respiration
if a person weighs 600n on earth. would this person weigh more or less on a planet with a larger radius
If a person weighs 600 N on Earth, they would weigh less on a planet with a larger radius. The weight of an object is determined by the force of gravity acting on it, and the force of gravity is directly proportional to the mass of the object and inversely proportional to the square of the distance between the object and the center of the planet. As the radius of the planet increases, the distance between the object and the center of the planet increases, which would decrease the force of gravity acting on the object and therefore decrease the object's weight.
It's worth mentioning that the mass of the person would be the same, so their weight would change due to the gravitational force.
