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A student drops the same 10 kilogram bowling ball three separate times. She drops the ball from heights of 1 meter, 2 meters, a...Asked by . . .
A student drops the same 10 kilogram bowling ball three separate times. She drops the ball from heights of 1 meter, 2 meters, and 3 meters. Which graph correctly shows the ball’s kinetic energy when dropped from each height?(1 point)
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Which of the graphs below best shows the relationship between a freely falling object’s gravitational potential energy and the object's height from the ground?(1 point)
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just explain how the graph would look
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What is one way to increase a ski jumper’s potential energy?(1 point)
Responses
By lowering the height of the ski jump hill
By lowering the height of the ski jump hill
By using shorter skis
By using shorter skis
By raising the height of the ski jump hill
By raising the height of the ski jump hill
By using longer skis
Responses
By lowering the height of the ski jump hill
By lowering the height of the ski jump hill
By using shorter skis
By using shorter skis
By raising the height of the ski jump hill
By raising the height of the ski jump hill
By using longer skis
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As shown below, an object with a mass of 5 kg is moving at a speed of 10 m/s. Another object with a mass of 10 kg is moving at a speed of 5 m/s.
Which of the objects has higher kinetic energy?
(1 point)
Responses
The 5 kg object has higher kinetic energy.
The 5 kg object has higher kinetic energy.
The objects have equal kinetic energy.
The objects have equal kinetic energy.
The 10 kg object has higher kinetic energy.
The 10 kg object has higher kinetic energy.
Both objects have zero kinetic energy.
Which of the objects has higher kinetic energy?
(1 point)
Responses
The 5 kg object has higher kinetic energy.
The 5 kg object has higher kinetic energy.
The objects have equal kinetic energy.
The objects have equal kinetic energy.
The 10 kg object has higher kinetic energy.
The 10 kg object has higher kinetic energy.
Both objects have zero kinetic energy.
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are you sure?
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Which statement best describes the relationship between a baseball’s potential and kinetic energy after it is thrown? (assume the ball travels in a straight line)(1 point)
Responses
Potential and kinetic energy both decrease.
Potential and kinetic energy both decrease.
Potential energy increases, and kinetic energy does not change.
Potential energy increases, and kinetic energy does not change.
Potential energy decreases as kinetic energy increases.
Potential energy decreases as kinetic energy increases.
Potential energy does not change, and kinetic energy decreases.
Responses
Potential and kinetic energy both decrease.
Potential and kinetic energy both decrease.
Potential energy increases, and kinetic energy does not change.
Potential energy increases, and kinetic energy does not change.
Potential energy decreases as kinetic energy increases.
Potential energy decreases as kinetic energy increases.
Potential energy does not change, and kinetic energy decreases.
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A student bounces a tennis ball. She drops the ball, and then it bounces back up to her. When does the ball have zero kinetic energy?(1 point)
Responses
As soon as she drops it
As soon as she drops it
Just after it hits the ground
Just after it hits the ground
At the very top of its bounce
At the very top of its bounce
Exactly when it hits the ground
Responses
As soon as she drops it
As soon as she drops it
Just after it hits the ground
Just after it hits the ground
At the very top of its bounce
At the very top of its bounce
Exactly when it hits the ground
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As shown below, a student places a 500-gram car at point X on a wooden racetrack in an energy transformation investigation.
What outcome is most likely if the student uses a 700-gram car instead?
(1 point)
Responses
A 700-gram car would have less kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have less kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have more kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have more kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have less potential energy at point X and less kinetic energy at the bottom of the racetrack
A 700-gram car would have less potential energy at point X and less kinetic energy at the bottom of the racetrack
A 700-gram car would have more potential energy at point X and more kinetic energy at the bottom of the racetrack
What outcome is most likely if the student uses a 700-gram car instead?
(1 point)
Responses
A 700-gram car would have less kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have less kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have more kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have more kinetic energy at point X and less potential energy at the bottom of the racetrack
A 700-gram car would have less potential energy at point X and less kinetic energy at the bottom of the racetrack
A 700-gram car would have less potential energy at point X and less kinetic energy at the bottom of the racetrack
A 700-gram car would have more potential energy at point X and more kinetic energy at the bottom of the racetrack
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In an investigation of potential and kinetic energy, a student stands at the top of a hill and pushes a ball down the hill as shown.
How does the potential and kinetic energy of the ball change as the ball rolls down the hill?
(1 point)
Responses
The potential and kinetic energy of the ball both decrease.
The potential and kinetic energy of the ball both decrease.
The potential energy of the ball increases, and the kinetic energy of the ball decreases.
The potential energy of the ball increases, and the kinetic energy of the ball decreases.
The potential and kinetic energy of the ball both increase.
The potential and kinetic energy of the ball both increase.
The potential energy of the ball decreases, and the kinetic energy of the ball increases.
The potential energy of the ball decreases, and the kinetic energy of the ball increases.
How does the potential and kinetic energy of the ball change as the ball rolls down the hill?
(1 point)
Responses
The potential and kinetic energy of the ball both decrease.
The potential and kinetic energy of the ball both decrease.
The potential energy of the ball increases, and the kinetic energy of the ball decreases.
The potential energy of the ball increases, and the kinetic energy of the ball decreases.
The potential and kinetic energy of the ball both increase.
The potential and kinetic energy of the ball both increase.
The potential energy of the ball decreases, and the kinetic energy of the ball increases.
The potential energy of the ball decreases, and the kinetic energy of the ball increases.
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The universe’s total amount of energy does not ever change, but the amount of this energy that is available to do work varies tremendously. What statement best explains the changes in available energy?(1 point)
Responses
100% of energy is always converted with perfect efficiency.
100% of energy is always converted with perfect efficiency.
Energy transfer always occurs through heat.
Energy transfer always occurs through heat.
The only way to create energy is through nuclear reactions.
The only way to create energy is through nuclear reactions.
Energy constantly changes from one form to another.
Responses
100% of energy is always converted with perfect efficiency.
100% of energy is always converted with perfect efficiency.
Energy transfer always occurs through heat.
Energy transfer always occurs through heat.
The only way to create energy is through nuclear reactions.
The only way to create energy is through nuclear reactions.
Energy constantly changes from one form to another.
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When a match is struck, what forms of energy does the burning match give off?(1 point)
Responses
Thermal energy and solar energy
Thermal energy and solar energy
Solar energy and nuclear energy
Solar energy and nuclear energy
Nuclear energy and light energy
Nuclear energy and light energy
Light energy and thermal energy
Light energy and thermal energy
Responses
Thermal energy and solar energy
Thermal energy and solar energy
Solar energy and nuclear energy
Solar energy and nuclear energy
Nuclear energy and light energy
Nuclear energy and light energy
Light energy and thermal energy
Light energy and thermal energy
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A light is connected to a battery as shown below.
What type of energy transfer occurs?
(1 point)
Responses
Chemical energy to mechanical energy
Chemical energy to mechanical energy
Chemical energy to electrical energy
Chemical energy to electrical energy
Mechanical energy to electrical energy
Mechanical energy to electrical energy
Electrical energy to mechanical energy
What type of energy transfer occurs?
(1 point)
Responses
Chemical energy to mechanical energy
Chemical energy to mechanical energy
Chemical energy to electrical energy
Chemical energy to electrical energy
Mechanical energy to electrical energy
Mechanical energy to electrical energy
Electrical energy to mechanical energy
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When an electric fan is plugged into a wall outlet, the fan blades spin as a result. What energy transformation occurred?(1 point)
Responses
Electrical to mechanical
Electrical to mechanical
Electrical energy is created, but mechanical energy is destroyed.
Electrical energy is created, but mechanical energy is destroyed.
Mechanical energy is created, but electrical energy is destroyed.
Mechanical energy is created, but electrical energy is destroyed.
Mechanical to electrical
Responses
Electrical to mechanical
Electrical to mechanical
Electrical energy is created, but mechanical energy is destroyed.
Electrical energy is created, but mechanical energy is destroyed.
Mechanical energy is created, but electrical energy is destroyed.
Mechanical energy is created, but electrical energy is destroyed.
Mechanical to electrical
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Heated gases will rise to the top of its container. Why does this occur?(1 point)
Responses
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will increase in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and decrease in density.
Responses
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will increase in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and decrease in density.
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The picture below shows two flasks, one with hot water and one with room temperature water, which are connected by a conductive metal bar.
In which direction does the thermal energy between the flasks flow?
(1 point)
Responses
Thermal energy flows from the flask with hot water to the flask with room temperature water.
Thermal energy flows from the flask with hot water to the flask with room temperature water.
Thermal energy flows equally between the two flasks.
Thermal energy flows equally between the two flasks.
Thermal energy flows from the flask with room temperature water to the flask with hot water.
Thermal energy flows from the flask with room temperature water to the flask with hot water.
Thermal energy does not flow between the two flasks.
In which direction does the thermal energy between the flasks flow?
(1 point)
Responses
Thermal energy flows from the flask with hot water to the flask with room temperature water.
Thermal energy flows from the flask with hot water to the flask with room temperature water.
Thermal energy flows equally between the two flasks.
Thermal energy flows equally between the two flasks.
Thermal energy flows from the flask with room temperature water to the flask with hot water.
Thermal energy flows from the flask with room temperature water to the flask with hot water.
Thermal energy does not flow between the two flasks.
Answered by
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Which type of energy transfer can take place without matter present?(1 point)
Responses
Convection
Convection
Radiation
Radiation
Insulation
Insulation
Conduction
Responses
Convection
Convection
Radiation
Radiation
Insulation
Insulation
Conduction
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