(a) The acceleration of the crate is 1.5 m/s^2
(b) The crate’s final velocity is 9 m/s.
What will be the crates acceleration?
To move the crate with a constant velocity, the force you apply must equal the force of friction. So, to move the crate, you must push with a force of 275 N.
If you push with a force of 380 N, the net force on the crate will be;
F (net) 380 N - 275 N = 105 N.
The acceleration of the crate will be given by Newton's second law of motion:
a = F / m
where;
a is the acceleration, F is the net force, and m is the mass of the crate.So, substituting in the known values, we get:
a = 105 N / 70 kg = 1.5 m/s^2
Finally, if the crate started from rest, its final velocity after 6 seconds can be found using the equation:
v = at
v = 1.5 m/s^2 x 6s = 9 m/s
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Position (m)
12 10
2
0
Position vs Time
2
Time (s)
8
10 12
Using the graph, describe what is happening between
4 and 6 seconds.
The object is moving away from the origin at a
constant velocity.
The object is not moving.
The object is moving toward the origin at a constant
velocity.
The object is changing velocity.
The object is moving away from the origin at a constant velocity.
option A.
What is constant velocity?Constant velocity refers to a situation in which an object moves at a constant speed in a straight line. This means that the magnitude of the velocity (i.e. the speed) of the object remains the same over time, while its direction may or may not change.
For example, a car moving at a constant 60 km/h on a straight road has a constant velocity.
Uniform velocity on the other hand, refers to a situation in which an object moves with a constant speed, but also changes its direction. I
In the graph, between 4 and 6 seconds, the object is moving at a constant velocity.
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What is the scientific definition of energy that relates it to work?
the ability to use the change in direction of an object
the ability to use an applied force to make an object move
the ability to use the stored potential of an object
the ability to use the change in temperature of an object
The capacity to perform work, which entails applying force to move an object across a distance, is another definition of energy. Energy is moved from one item to another while work is done. Thus, option B is correct.
What type of energy that relates it to work?The definition of energy as the “power to accomplish work" refers to the capacity to apply a force that moves an object.
Any force that is exerted on an object, whether by a person or another object, is referred to as an applied force. An applied force is exerted on an object when someone pushes it across the room.
Energy is referred to by scientists as the capacity to work. Modern civilization is made possible by the discovery of how to change energy from one form to another and use it to complete activities.
Therefore, the ability to use an applied force to make an object move.
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which of the following does not accurately describe earth's distance from the sun? which of the following does not accurately describe earth's distance from the sun? earth is closest to the sun in january (perihelion). due to earth's circular orbit, it is always equidistant from the sun throughout the year. the earth-sun distance averages 150 million kilometers (93 million miles). it takes light an average of 8 minutes and 20 seconds to travel from the sun to earth. earth is farthest away from the sun in july (aphelion).
The following are incorrect estimates of Earth's distance to the Sun:
The earth constantly orbits the sun equally throughout the year because of its round orbit.it takes light an average of 8 minutes and 20 seconds to travel from the sun to earth. Explain the revolution of earth around sun?Revolution is the name for the earth's fixed orbital motion around the sun.
The Sun's gravitational force causes the Earth to revolve, creating an elliptical orbit.
An elliptical orbit is just a circle that has been flattened or has an extended route with two distinct foci. The eccentricity of the Earth's orbit, or how far from a circle it deviates from, is roughly 0.01671.According to the stars, the Earth orbits the sun in 365 days, 6 hours, and 9 minutes, rotating at a speed between 29.29 and 30.29 km/s. Every four year, which is known as a leap year, the 6 hours, 9 minutes add up to roughly one extra day, with February 29th being the added day. The eccentric orbit of Earth makes its closest point to a sun, or perihelion, on or around January 4th of every year. Six months later, at 152,100,000 km, is aphelion.Thus, the following are incorrect estimates of Earth's distance to the Sun:
The earth constantly orbits the sun equally throughout the year because of its round orbit.it takes light an average of 8 minutes and 20 seconds to travel from the sun to earth.To know more about the revolution of earth, here
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if a gymnast leaves the ground with a vertical velocity of 9.81 m/s when doing a back flip, where in her trajectory will her center of mass be 1.0 seconds later?
The correct option is B. Her trajectory will her center of mass be 1.0 seconds later at the apex.
[tex]V = V_0 - g*t[/tex]
where,
[tex]V_0 = initial velocity[/tex]
acceleration due to gravity = 9.8 m/s^2
t = 1.0 seconds
substituting the above values in the equation;
[tex]V_0 = 9.8 m/s + 9.8m/s^2*1.0 sec\\V_0 = 19.6 m/s[/tex]
**Hence after 1.0 sec the gymnast would almost reach 19.6 m as distance.
According to the trajectory of mass thrown uniformly,
[tex]H_(max)= v^2/ 2*g = 19.6^2/2*9.8 = 19.6 m[/tex] ----> indicates the mass reaches the peak after a time of 1.0 seconds
Speed is the directional velocity of an item in motion as an indication of its price of exchange in the role as located from a selected frame of reference and as measured through a specific widespread of time (e.g. 60 km/h northbound). speed is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of our bodies.
Velocity is a physical vector amount; both value and route are had to outline it. The scalar absolute value (magnitude) of velocity is referred to as pace, being a coherent derived unit whose quantity is measured in the SI (metric system) as meters according to 2nd (m/s or m⋅s−1). as an example, "five meters per 2d" is a scalar, while "five meters in keeping with 2d east" is a vector. If there may be a change in velocity, course, or both, then the object is said to be present process an acceleration.
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Complete Question:
If a gymnast leaves the ground with a vertical velocity of 9.81 m/s when doing a back flip, where in her trajectory will her center of mass be 1.0 sec later? Show the equation applied!
a) Approaching the apex
b) at the apex
c) descending from the apex
d) on the ground
e) not enough information
if both the speed and stopping distance of a driver are doubled, by what factor does the force exerted on the driver change? g
If both the speed and stopping distance of a driver are doubled, the force exerted on the driver will be reduced by a factor of 2 (or 50%).
The force exerted on the driver when stopping a car is given by the formula:
[tex]F = (mv^2) / (2d)[/tex]
Where:
m = mass of the car
v = velocity of the car before braking
d = stopping distance
If both the speed and stopping distance of the car are doubled, then the new velocity and stopping distance will be 2v and 2d, respectively. Therefore, the new force exerted on the driver will be:
[tex]F' = (m(2v)^2) / (2(2d))[/tex]
[tex]F' = (4mv^2) / (4d)[/tex]
[tex]F' = (mv^2) / d[/tex]
Comparing this to the original formula for force, we can see that the new force exerted on the driver is simply half of the original force:
[tex]F' = (mv^2) / d = 1/2 * (mv^2) / (1/2 * d) = 1/2 * F[/tex]
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a person flying in a plane over easter island notices that the water around the island appears bluer than the surrounding water. what property of light waves causes the water to be a different color to the observer?
The property of light waves that causes the water around Easter Island to appear bluer than the surrounding water is called "scattering". Scattering occurs when light waves interact with particles in the atmosphere or in a medium such as water.
In the case of the water around Easter Island, the blue color is due to the scattering of sunlight by the water molecules in the ocean. Sunlight is composed of different wavelengths of light, and when it enters the ocean, the water molecules scatter the shorter, blue wavelengths more than the longer, red wavelengths. This means that more of the blue light is scattered in all directions, including towards the observer in the plane, making the water appear blue.
The blueness of the water is more noticeable around Easter Island because the island is surrounded by deep ocean water, which absorbs longer wavelengths of light and allows more of the blue light to be scattered. In contrast, the surrounding shallower waters or other parts of the ocean may have more particles, such as algae or sediment, that scatter more of the longer wavelengths of light, making the water appear a different color, such as green or brown.
Overall, the scattering of light waves by particles in the atmosphere or in a medium is a common phenomenon that can cause objects or substances to appear different colors to an observer. The specific color that is observed depends on the properties of the light waves, the properties of the particles, and the angle and distance of the observer.
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two blocks are on a frictionless surface and have the same mass m. block 2 is initially at rest. block 1 moves to the left with speed 4v and collides elastically with block 2. what is the final speed of block 1?
The final speed of block 1 is 2.4 times its initial speed, or [tex]2.4v[/tex]. The collision between two objects is said to be elastic if both the total momentum and the total kinetic energy are conserved.
In an elastic collision between two objects, both the total momentum and the total kinetic energy are conserved.
Let's consider the collision between block 1 and block 2. The mass of both blocks is the same, so we can write the conservation of momentum equation as:
[tex]m(4v) = m(v1f) + m(v2f)[/tex]
where 4v is the initial velocity of block 1, v1f is the final velocity of block 1, and v2f is the final velocity of block 2. Since block 2 is initially at rest, its initial velocity is zero.
Since the collision is elastic, the total kinetic energy of the system is conserved, and we can write the conservation of kinetic energy equation as:
[tex](\frac{1}{2})m(4v)^2 = (\frac{1}{2})m(v1f)^2 + (\frac{1}{2})m(v2f)^2[/tex]
Simplifying these equations, we get:
[tex]4v = v1f + v2f[/tex] (conservation of momentum)
[tex](\frac{16}{2})v^2 = (\frac{1}{2})v1f^2 + (\frac{1}{2})v2f^2[/tex] (conservation of kinetic energy)
Solving for v1f, we can substitute[tex]v2f = (4v - v1f)[/tex] into the second equation:
[tex](\frac{16}{2})v^2 = (\frac{1}{2})v1f^2 + (\frac{1}{2}) (4v - v1f)^2[/tex]
Simplifying and solving for v1f, we get:
[tex]v1f = (\frac{3}{5})4v \\ = 2.4v[/tex]
Therefore, the final speed of block 1 is 2.4 times its initial speed, or [tex]2.4v[/tex]
The collision between two objects is said to be elastic if both the total momentum and the total kinetic energy are conserved. This means that the momentum of the system before the collision is equal to the momentum of the system after the collision, and the kinetic energy of the system before the collision is equal to the kinetic energy of the system after the collision.
The law of conservation of momentum states that the total momentum of a system of objects remains constant if no external forces act on the system. In an elastic collision, the momentum of each object is conserved separately, so we can write the equation:
[tex]m1v1i + m2v2i = m1v1f + m2v2f[/tex]
where m1 and m2 are the masses of the two objects, v1i and v2i are their initial velocities, and v1f and v2f are their final velocities.
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c. s. lewis correctly understood that there are at least three important ways in which science and magic are similar. which is not one of the key similarities developed in west’s text
C.S. Lewis believed that science and magic are distinct and incompatible ways of knowing and interacting with the world
What is science and magic?C.S. Lewis believed that science and magic are distinct and incompatible ways of knowing and interacting with the world. Science is concerned with understanding the natural world through observation and experimentation, while magic is a form of supernatural power that operates outside the laws of nature.
Lewis also believed that science and magic have different ethical implications. Science is morally neutral, while the use of magic often has negative consequences and can lead to a desire for power and control.
In his fiction, such as the Chronicles of Narnia series, Lewis often used the contrast between science and magic to explore larger philosophical and spiritual themes.
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what is the magnitude of the force caused by air resistance, fr in newtons? (maintain the assumption that the truck's velocity is constant.)
The same as long as the other variables in the equation (Cd, A, and rho) remain unchanged.
What is variables?A variable is a symbolic name that represents a value that can be changed. Variables are used in programming to store values that can be used throughout the program or in specific functions. Variables can be any type of data including numbers, strings, Booleans, and objects.
The magnitude of the force caused by air resistance, fr, in Newtons is determined by the drag equation: fr = 0.5*Cd*A*rho*v^2, where Cd is the drag coefficient, A is the frontal area, rho is the density of the air, and v is the velocity. Since the truck's velocity is assumed to be constant, the magnitude of the force caused by air resistance (fr) will remain the same as long as the other variables in the equation (Cd, A, and rho) remain unchanged.
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a system containing 1 atm of an ideal gas is doubled in temperature and halved in volume. what is the new pressure?
The amount of moles of gas n=RT PV using the Ideal gas equation
P ′ = 2P new pressure
T ′ = 2T new temperature
V ′ =V/2 new volume
Hence, the number of moles of gas n ′ = (2P)/(V/2) / R(2T) (2P)(V/2) = n/2
When all other variables are held constant, pressure is directly proportional to force (F) and inversely proportional to area (A). As a result, when Area A is doubled, the pressure is cut in half. Area A is cut in half. The pressure P has been doubled. At STP (standard temperature, 273.15 K and pressure, 1 atm), the volume of 1.00mol of any gas is measured to be 22.414L. 1 atm equals 760 mm Hg. The Pascal, on the other hand, is the standard international unit for pressure. 1 atm Equals 101325 Pa. The English physicist Robert Boyle conducted a series of pressure tests and arrived at a general law—that the volume of a gas varies inversely with pressure—in 1662. PV stands for constant.
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The density equation is
ρ = m/v
The density of water is 1gram per 1milliliter of water. Written as 1g/1ml.
Use the density of water and the density equation to calculate the mass of 334 ml of water.
A 334 grams of water
B 334 grams/ml of water
C .003 grams/ml of water
D .003 grams of water
Answer:
We can use the density equation to find the mass of 334 ml of water.
Explanation:
Given that the density of water is 1 g/ml, we can substitute the values into the density equation:
ρ = m/v
ρ = 1 g/ml
v = 334 ml
So, m = ρ x v
m = 1 g/ml x 334 ml
m = 334 g
Therefore, the mass of 334 ml of water is 334 g, which is answer option A: 334 grams of water.
After which action would the concentration of a solution remain constant?(1 point)
removing solution from the container
adding water to the solution
evaporating water from the container
adding solute to the solution
Answer:
The action that would cause the concentration of a solution to remain constant is removing solution from the container.
What is concentration of a solution?
The concentration of a solution is the measure of the amount of solid particles (solute) that has been dissolved in the given amount of a solvent.
Adding water to a solution will dilute the solution, hence changes the concentration of the solution.
Also, adding solute will change the concentration of the solution.
Thus, the action that would cause the concentration of a solution to remain constant is removing solution from the container.
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what is the frequency of electromagnetic radiation with a wavelength of 745 nm appears as red light to the human eye?
The frequency of electromagnetic radiation with a wavelength of 745 nm appears as red light to the human eye is 2.66 x 10^-19 Joules.
Wavelength of the electromagnetic radiation = 745 nm = 7.45 x 10^-7 m
1m = 1 x 10^-9 nm
Energy of the photon will be given by Plank's equation:
E = hc / λ
E = 6.626 x 10^-34J[tex]\pi[/tex] x 3 x 10^8 m/s / 7.45 x 10^-7m
E = 2.66 x 10^-19 Joules
Electromagnetic radiation is a form of energy that travels through space in the form of waves. This energy is generated by the movement of electric and magnetic fields, which oscillate at right angles to each other. These waves can vary in their frequency, wavelength, and energy, and are classified based on their position on the electromagnetic spectrum.
At one end of the spectrum, we have low-energy, long-wavelength waves, such as radio waves and microwaves, which are commonly used for communication and heating applications. In the middle of the spectrum, we find visible light, which is the only portion of the spectrum that our eyes can detect. At the other end of the spectrum, we have high-energy, short-wavelength waves, such as X-rays and gamma rays, which can be harmful to living organisms in high doses.
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Which two statements are true about this chemical reaction that forms acid rain?
Statement that is true about chemical reaction that forms acid rain : b)The bonds that break are between N and O in HNO2and between O and H in HNO3.
What is acid rain?Acid rain is a acid deposition, which refers to the many ways in which acidity can move from atmosphere to Earth's surface. Acid deposition includes acidic rain as well as other forms of acidic wet deposition such as snow, sleet, hail, and fog.
HNO2 is less stable thus dissociates easily to HNO3 + NO + H2O and HNO3 is a strong acid. Therefore, when they react with H2O, they form acid rain.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: Which two statements are true about this chemical reaction that forms acid rain? 2NO2 + H2O--> HNO2 +HNO3
a) The bonds that form are between N and O in HNO2 between and between O and H in HNO3.
b)The bonds that break are between N and O in HNO2and between O and H in HNO3.
c)The bonds that break are between N and O in NO2 and between O and H in H2O.
d)The bonds that form are between N and O in NO2 and between O and H in H2O.
Answer: The correct two answers are :
1.) The BONDS that FORM are between N and O in HNO 2 and between O and H in HNO 3
2.) The BONDS that BREAK are between N and O in NO2 and between H and O in H2O
Explanation: I took the test.
If a box of 11.54 kg is sliding down the ramp at an angle of 31.04 at a constant velocity, what is the force of friction acting on the box?
The frictional force acting on the box is just opposite to the normal force acting on the box by its weight. Here, the frictional force is,
What is friction ?Friction is a kind force that opposes the normal force acting on an object. The frictional force, is a resistive force having a negative sign always. The frictional force increases as the roughness of the surface through which the object is moving.
Here, the mass of the box m = 11.54 kg
angle of sliding = 31.04 °
acceleration due to gravity of earth = 9.8 m/s²
The frictional force that opposes the motion of the box sliding down the surface is just opposite to the normal force on the box by its own weight.
F = - mg cosθ
= - 11.54 kg × 9.8 m/s² × 31.04°
= -105.9 N
Therefore, the frictional force acting on the box is -105.9 N.
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An apple pie is cut into six equal slices as shown below. If the diameter of the pie is , what is the approximate arc length of one slice of pie?
The approximate arc length of one slice of pie when a pie is cut into 6 pieces if the diameter of the pie is 10 inches is 5π/3in.
Given the diameter of apple pie (d) = 10 inches
Then, the radius of each piece (r) = 10/2 = 5 inches
The number of apple pieces = 6
Let the angle made by each apple piece = θ
Let the arc length = L
We know that the circumference of the circle is represented as:
C = 2πR = 2π*5 (in) = 10π (in)
When a pie is sliced into six equal pieces, the circumference is also divided into six equal arcs, which equals 10π/6 (in) = 5π/3 (in)
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complete question: A pie is cut into 6 pieces if the diameter of the pie is 10 inches. what is the approximate arc length of one slice of pie?
Pie = symbol
A- 10pie / 3
B- pie
C- 5pie / 6
D- 5pie / 3
What is the name for the type of heat transfer that occurs when vibrating particles pass their energy on to neighbouring particles?
ball a is projected vertically upward at 30 m/s from a point p. four seconds later, ball b is also launched vertically upwards from the same point p and also at 30 m/s. for how long has ball a been in motion when two balls collide? take the acceleration due to gravity to be g
Ball A has been in motion for 2.77 seconds when the two balls collide.
For ball A, use the second law of motion equation to find its displacement after 4 seconds,
[tex]y_A = (30)4 + \dfrac{1}{2}(-g)(4)^2[/tex]
yA = 41.6 m
Find the time it takes for ball B to reach the same height,
41.6 m = (30 m/s)t + (1/2)(-g)t^2
Solving this quadratic equation for t,
[tex]t = \dfrac{30 \pm \sqrt{(30)^2\times - 4\times (-4.9)(-41.6)}} {2(-4.9)}[/tex]
t ≈ 3.33 s or t ≈ 6.77 s
Therefore, the time elapsed for ball A when the two balls collide is,
tA = t - 4 s
tA = 3.33 s - 4 s
tA = -0.67 s (disregarded, since it is negative)
or
tA = 6.77 s - 4 s
tA = 2.77 s
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a merry-go-round makes one complete revolution in 12.71 s. a 34.12 kg child sits on the horizontal floor of the merry-go-round 2.34 m from the center. what minimum coefficient of static friction is necessary to keep the child from slipping? the acceleration of gravity is 9.8 m/s 2 .
To prevent the kid from slipping, static friction needs to be at least 1 coefficient.
Examples of static friction are given below./A force called static friction prevents an object from moving along the path. This friction happens when two materials are slid over one another. Conflict is there all around us. For instance, when we walk, our feet are in contact with the ground.
Newton's second rule of motion can be used to calculate the amount of force needed to prevent the kid from slipping:
ΣF = ma
where ΣF is the sum of the forces acting on the child, m is the mass of the child, and a is the acceleration of the child. Since the child is not slipping, the force of static friction f must equal the force of gravity on the child Fg:
f = Fg
where Fg = mg, and g is the acceleration due to gravity.
The acceleration of the child can be expressed in terms of the angular acceleration of the merry-go-round, α, using the formula:
a = rα
where r is the distance of the child from the center of the merry-go-round.
The angular acceleration can be found from the time it takes for the merry-go-round to make one complete revolution, T, using the formula:
α = 2π / T
Substituting these values into the equations above, we get:
f = Fg
μs N = mg
μs mg = mg
μs = 1
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a hamster runs at a speed of 13 centimeters per second in a wheel of radius 14 centimeters. a) what is the angular velocity of the wheel? (in radians/sec) incorrect radians/sec correctradians/sec no decimals allowed. b) how fast will the wheel spin in revolutions per minute? incorrect rev/min correctrev/min no decimals allowed.
The angular velocity of the wheel is 0.9286 radians/sec and the number of revolutions per minute is 8.84 rpm
The angular velocity of the wheel in radians per second is given by the formula:
ω = v/r where ω is the angular velocity in radians per second, v is the linear velocity in cm/s, and r is the radius of the wheel in cm.
Therefore, the angular velocity of the wheel is:
ω = 13 cm/s / 14 cm = 0.9286 radians/sec
To calculate the revolutions per minute (rpm), we use the formula:
rpm = ω * 60 / (2π)
where 2π is the number of radians in a full revolution.
Therefore, the wheel will spin at a rate of:
rpm = 0.9286 radians/sec * 60 / (2π) = 8.84 rpm
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Two stars are of equal luminosity. Star A is 3 times as far from you as star B. Star A appears _________ star B. Choose one: A. 3 times brighter than B. 9 times brighter than C. one-third as bright as D. the same brightness as E. one-ninth as bright as\
Two stars are of equal luminosity. Star A is 3 times as far from you as star B. Star A appears the same brightness as star B.
What is luminosity?
Luminosity is a measure of the amount of energy that is emitted by a star or other celestial object, usually measured in terms of its brightness. It is related to the star's surface area and temperature, as well as its distance from the observer. Luminosity is an important factor in determining the evolution of a star and its eventual fate.
Therefore, Two stars are of equal luminosity. Star A is 3 times as far from you as star B. Star A appears the same brightness as star B.
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which of the following statements concerning the motion of a physical pendulum is incorrect? responses the period is changed if the mass of the bob is doubled and the length of the pendulum is halved the period is changed if the mass of the bob is doubled and the length of the pendulum is halved the time interval between conditions of maximum potential energy is one period. the time interval between conditions of maximum potential energy is one period. the kinetic energy is a minimum when the displacement is a maximum. the kinetic energy is a minimum when the displacement is a maximum. the acceleration is a maximum when the displacement is a maximum
The statement that is incorrect is: The time interval between conditions of maximum potential energy is one period.
The time interval between conditions of maximum potential energy is not always one period. The period of a pendulum is the time it takes for the pendulum to complete one full cycle of motion, which is determined by the length of the pendulum and the acceleration due to gravity. The time interval between conditions of maximum potential energy depends on the initial conditions of the pendulum, such as the initial angle and the initial velocity. If the initial angle or the initial velocity is changed, then the time interval between conditions of maximum potential energy will change as well.
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Calculate the weight of an object of mass 15Kg kept on the earth. If the same object is taken to mars, what change will happen to its mass and weight?(freefall acceleration on mars=3.7 m/s2)
Answer:
Weight on Mars = 55.5 Newtons
Approximately 37.72% of weight on earth
Explanation:
Mass of an object is unchanged throughout the universe
Therefore mass on Mars = mass on Earth = 15kg
Weight = mass x freefall acceleration
Weight on Earth = 15 kg x 9.81 m/s² = 147.15 Newtons (N)
Weight on Mars = 15 x 3.7 m/s² = 55.5 N
Therefore weight on Mars/ weight on earth = 55.5 N/147.15N
≈ 0.3772
= 37.72 % of weight on earth
The amount of energy required to remove an electron from an isolated atom or molecule is the ionisation potential. There is an ionization energy for each successive electron removed. true or false?
The following statement "The amount of energy required to remove an electron from an isolated atom or molecule is the Ionization potential. There is an ionization energy for each successive electron removed" is true.
A molecule is a collection of two or more atoms bound together by chemical bonds; depending on the context, the phrase may or may not include ions that meet this definition.
In quantum physics, organic chemistry, and biochemistry, the difference between ions and molecules is lost, and the term molecule is frequently used to refer to polyatomic ions. A molecule can be homonuclear, consisting of atoms of one chemical element, such as two atoms in the oxygen molecule (O2), or heteronuclear, consisting of more than one element.
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the amount of incoming solar radiation available at various places on the earth depends mainly on
This is based on a location's latitude. As latitude rises, the sun's rays' angle with the earth's surface decreases, resulting in slanted sunrays. Vertical rays always cover less area than rays that are angled.
What amount of incoming solar radiation on the earth?The amount of incoming solar energy that is accessible varies on the longitude, day of the year, time of day, and degree of cloud cover. The amount of solar energy received at a given latitude would not change throughout the year if the earth were not tilted from the vertical.
The solar radiation that reaches the surface of the earth is known as insolation. The quantity of solar energy absorbed per square centimeter every minute is used to calculate it.
Therefore, the amount of insolation (incoming solar energy) that is received each day mostly relies on. the Sun's angle above the horizon, also known as the solar incidence angle. the amount of time the surface is exposed to the Sun, as well as the atmosphere.
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a cold beer initially at 35of warms up to 40of in 3 min while sitting in a room of temperature 70of. how warm will the beer be if left out for 20 min?
The temperature of the beer if left out for 20 mins would be 53.1°F.
Newton's law of coolingWe can use Newton's law of cooling to estimate how warm the beer will be after 20 minutes. Newton's law of cooling states that the rate of change of the temperature of an object is proportional to the difference between the object's temperature and the temperature of its surroundings. In this case, the rate of change of the beer's temperature is:
d(T)/dt = k(T - T_s)
where T is the temperature of the beer, T_s is the temperature of the surroundings, and k is a constant of proportionality.
From the problem, we know that the initial temperature of the beer is T(0) = 35°F and that it warms up to T(3) = 40°F in 3 minutes. Therefore, we can use this information to find the value of k:
k = [T(3) - T(0)] / [(T(3) - T_s) * t] = [40 - 35] / [(40 - 70) * 3] = 1/30
Now we can use this value of k to estimate the temperature of the beer after 20 minutes:
T(20) - T_s = [T(0) - T_s] * exp(-kt) = (35 - 70) * exp(-(1/30)*20) = -35 * exp(-2/3) ≈ -16.9°F
Therefore, the temperature of the beer after 20 minutes will be approximately 70°F - 16.9°F = 53.1°F.
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Which energy associated with movement is energy while energy is stored energy? Kinetic Energy | Potential Energy | Mecanic Energy | Biodiesel Energy
The energy associated with movement is Kinetic Energy, while energy that is stored is Potential Energy.
What is Kinetic vs Potential energy?Two types of energy—kinetic energy and potential energy—describe the condition of a system. While potential energy is the energy stored in an object or system based on its location or configuration, kinetic energy is the energy of motion.
The energy that an object has as a result of motion is known as kinetic energy. The formula KE=1/2mv2 can be used to calculate an object's kinetic energy, which depends on its mass and speed. In this instance, m stands for the object's mass and v for its speed. An object has more kinetic energy the faster it moves. For instance, a moving vehicle has more kinetic energy than a vehicle that is stationary.
On the other hand, potential energy is the energy that an object has as a result of its position or configuration. It is frequently referred to as the energy that a thing possesses as a result of its capacity for labor. Gravitational potential energy, or the energy an item has as a result of its position with respect to a reference point like the ground, is the most typical illustration of potential energy. A lower-altitude item has less gravitational potential energy than a higher-altitude object. PE=mgh, where m is the object's mass, g is the acceleration brought on by gravity, and h is the object's height above the reference point, is the formula for gravitational potential energy.
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. What voltage is required to move 2mA through 0.5kΩ?mm DS m. M m m. Feed
Answer: The voltage required to move a current of 2mA through a resistor with a resistance of 0.5 kΩ can be calculated using Ohm's law, which states that the voltage across a resistor is equal to the current flowing through it multiplied by the resistance:V = I * RV = 2mA * 0.5 kΩV = 1VSo, the voltage required to move 2mA through 0.5 kΩ is 1 Volt.
while a _______ is a group of closely related phenomena or observations, _______ is a logical idea that can be tested.
While a theory is a group of closely related phenomena or observations, hypothesis is a logical idea that can be tested.
How would you define hypothesis?
An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true. In the scientific process, the hypothesis is developed before any pertinent research—aside from a basic background review—has been conducted.
In addition to explaining existing facts, a theory also enables scientists to forecast what observations they should expect to see if the theory is correct. Scientific hypotheses can be tested. A theory should be consistent with new data.
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what must be the mass m2 of the hanging block if it is to descend 9.50 m in the first 3.00 s after the system is released from rest? express your answer with the appropriate units.
The mass [tex]m_{2}[/tex] of the hanging block is 20 kg.
A body of coherent matter, typically of undefined form and structure, or maybe even a grouping of incoherent components, components, or things viewed as comprising one body.
Suddenness of movements or operation; promptness; quickness as well as mechanical the measured or counted at which a body's position changes in a specific direction.
For this it is important to assume a tension value, otherwise, it is impossible to determine the value of mass m, in Newton's second law equation.
According to the question,
Initial velocity, [tex]$V_o=0 \mathrm{~m} / \mathrm{s}$[/tex]
Time, t = 3 sec
We know,
[tex]$\Rightarrow y=v_o \times t+0.5 \times a \times t^2$[/tex]
By substituting the values,
0.01 = [tex]0.5 \times a \times(3)^2 \\[/tex]
a = 0.0022 m / [tex]\mathrm{s}^2[/tex]
Hence, T- mg = ma
or,
[tex]$\Rightarrow m & =\frac{T}{g-a} \\[/tex]
[tex]$& =\frac{196}{9.81-0.00222} \\[/tex]
= 20 kg
Therefore the answer is 20 kg.
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