Question

If a student puts their hand on a cold metal doorknob, how will thermal energy move?
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1 point
Cold moves from the doorknob to her hand
Heat moves from her hand to the doorknob
Heat moves from the doorknob to her hand
Cold moves from her hand to the doorknob
A student places a cold metal nail in a cup of hot water for five minutes. When she removes the nail from the water, it feels warmer. How does the hot water affect the motion of the metal atoms in the nail?
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1 point
It causes the atoms to vibrate faster.
It causes the atoms to vibrate slower.
It causes the atoms to stop moving at all.
It causes the atoms to move closer together.
Two objects are sitting on a table. Thermal energy is being transferred from one object to another.

When does this transfer of thermal energy stop?

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1 point
when one object is much warmer than the other
when the two objects are different temperature
when both objects are the same temperature
when one object has completely cooled
Convection ovens are ovens that are advertised to cook food more evenly than a standard thermal oven.

Which statement BEST explains how a convection oven works?

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1 point
Hot air is transferred through molecule to molecule contact.
Hot air is transferred through heat being radiated from a thermal burner.
Hot air is transferred through density differences with hot air rising and cool air sinking.
Hot air is transferred through density difference with cool air rising and hot air sinking.
A student wants to show the transfer of heat energy without matter. Which investigation design would best help the student?
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1 point
an investigation of radiation through a current in a fluid
an investigation of radiation through electromagnetic waves
an investigation of conduction through collisions between particles in space
an investigation of conduction through the movement of particles through a solid
While at soccer practice, Abbey runs down the field at 10 meters per second. She has a constant speed and does not change direction.

What is Abbey's acceleration?

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1 point
The acceleration is 0 m/s2 because her velocity did not change.
The acceleration is 10 m/s2 because her velocity increased.
The acceleration is 0 m/s2 because her velocity increased.
The acceleration is 10 m/s2 because her velocity did not change.
Shelly wants to find the speed that her dog can run.

What should Shelly do?

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1 point
measure the time the dog runs
measure the distance the dog runs
measure the size of the dog and the distance it runs
measure the time it takes for the dog to run a certain distance
A car travels 40 miles north in the first 40 minutes of a trip. The same car travels 30 miles west in the next 30 minutes of the trip. What can be said about the motion of the car?
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1 point
The car is traveling at a constant speed.
The car is accelerating at a constant rate.
The car is decreasing its speed.
The car is moving at a constant velocity.

Answer 1

1) Heat moves from her hand to the doorknob.

2) It causes the atoms to vibrate faster.

3) when both objects are the same temperature.

4) Hot air is transferred through density differences with hot air rising and cool air sinking.

5) an investigation of radiation through electromagnetic waves.

6) The acceleration is 0 m/s2 because her velocity did not change.

7) measure the time it takes for the dog to run a certain distance.

8) The car is traveling at a constant speed.