Test- Unit 7 Energy

Question 1

Is plastic a insulator or conductor

Answer 1

Insulator

U7C2

Question 2

Give two examples or how thermal energy is used?

Answer 2

A pan on an oven and iron on an ironing board

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Question 3

What is Bobs power i’d he used a force of 10N to pull a 59kg trunk a distance of 5m in 2 seconds

Answer 3

25W

Notes practice

Question 4

What also increases when the kinetic energy in an object increases

Answer 4

velocity

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Question 5

What is the mass of a medicine ball that has 10 J of energy and is thrown upward with a velocity of 2m/s

Answer 5

T kg

U7C2

Question 6

How is conduction transferred

Answer 6

direct particle contact

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Question 7

Where is the GPE of a bat

Answer 7

the beginning of the swing

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Question 8

What would green plants convert to during photosynthesis

Answer 8

chemical potential energy

Question 9

Why does you hand feel cold when u hold an ice cube

Answer 9

heat flows from your hand to the ice cube

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Question 10

When does GPE increase

Answer 10

with its height

U7C3

Question 11

The Intercal energy you have a coconut falling from the tree

Answer 11

remains constant

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Question 12

when oil is burned to produce electricity the electrical energy produced is last on the potential energy in the oil. Why?

Answer 12

some of the potential energy and oil is converted into the forms of energy other than electricity

U7C2