Test energy: thermal energy, work and power

Question 1

How much force is required to lift a rock a vertical distance of 8 m if 80 J of work were done?

Answer 1

10N

Question 2

thermal energy is transferred to the solar panel in picture B by

Answer 2

radiation

Question 3

Which picture shows thermal energy transfer by convection?

Answer 3

kettle

Question 4

Transfer of energy by the movement of heated particles.

Answer 4

convection

Question 5

Transfer of energy that occurs when a force makes an object move.

Answer 5

work

Question 6

The diagram to the right shows four locations in a temperature field. The temperature of each location is given in degrees Celsius. Heat energy will normally flow from:

Answer 6

c to b

Question 7

As the time required to do a given amount of work decreases, the power developed

Answer 7

increases

Question 8

Which pictures show the same type of thermal energy transfer? . *

Answer 8

A and C

Question 9

The rate at which work is done is ____. *

Answer 9

power

Question 10

When oil is burned to produce electricity, the electrical energy produced is less than the potential energy in the oil. Which best explains this observation? *

Answer 10

Some of the potential energy in oil is converted into forms of energy other than electricity.

Question 11

When you hold an ice cube, your hand feels cold because *

Answer 11

heat flows from your hand to the ice cube.