AnswersNC-Physical ScienceConvection

Introduction to Waves Answers

25 verified answers
21
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Which set of terms best defines what affects kinetic energy and potential energy, respectively?

A
position, gravity
B
gravity, velocity
C
velocity, height
D
height, position
22
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Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

A
the volume and height the ball reaches
B
the volume and shape of the ball
C
acceleration due to gravity and the height the ball reaches
D
acceleration due to gravity and the shape of the ball
23

A scientist designed a foam container to help keep frozen foods from melting. Which best explains how the foam works?

A
It removes thermal energy from the air inside the container.
B
It removes thermal energy from the frozen foods inside the container.
C
It reduces the amount of thermal energy that is transferred from inside to outside the container.
D
It reduces the amount of thermal energy that is transferred from outside to inside the container.
24

Heat transfer between two substances is affected by specific heat and the

A
chemical composition of the substances.
B
state of matter of the substances at room temperature.
C
thermal equilibrium of the substances.
D
amount of time and area of physical contact between the substances.
25

When a spring is compressed, the energy changes from kinetic to potential. Which best describes what is causing this change?

A
work
B
power
C
gravitational energy
D
chemical energy

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