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Physics > Energy > Flashcards

Energy Flashcards

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0
Q

What does potential mean?

A

Stored

Energy in battery stored until you release it when connected to circuit

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1
Q

What are the nine types of energy?

A

Kinetic, thermal, chemical potential, nuclear, sound, light, electrical, gravitational potential, elastic potential

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2
Q

What is gravitational potential?

A

Like height energy

Higher up you go, more energy you have

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3
Q

What is energy?

A

Ability to do work

Work is done when energy is transferred from one form to another

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4
Q

What is energy measure in?

A

Joules

Food energy is measured in kilojoules or kilocalories

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5
Q

Kinetic examples

A

Airplane, car, running

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6
Q

Thermal examples

A

Geothermal, fire, sun

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7
Q

Chemical potential examples

A

Food, batteries, petrol

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8
Q

Nuclear examples

A

Nuclear bomb, powerstation

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9
Q

Sound examples

A

Speaking, singing, ultrasound

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10
Q

Light examples

A

Sun, lightbulb, fireworks

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11
Q

Gravitational potential examples

A

Rocket, Lift, crane

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12
Q

Electrical examples

A

Chargers, radio, lightning

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13
Q

Elastic potential examples

A

Rubber bands, windup toys, trampoline

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14
Q

Is all of the original energy transferred?

A

What energy is transferred, only part of the original energy is transferred usefully

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15
Q

Efficiency equation

A

Useful energy output
/
Total energy input

16
Q

What is the law of conservation of energy?

A

Energy cannot be created or destroyed, but transferred from one form into another

17
Q

Why is there not infinite energy?

A

Energy becomes increasingly spread out and more difficult to use
Normally ends up being heat energy

18
Q

What is heat?

A

Type of energy that flows from warm to cold areas

19
Q

What happens if there is a difference in temperature between two places?

A

Heat will pass between them until thermal equilibrium

20
Q

What is thermal equilibrium?

A

Temperatures are balanced

21
Q

What are the three types of heat transfer?

A

Conduction, convection, radiation

22
Q

What does a great difference in temperature mean?

A

Greater rate of transfer of energy

Physics (7 decks)

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