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Physics > Energy > Flashcards

Energy Flashcards

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1
Q

What is a system

A

An object or a group of objects that interact

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2
Q

Types of energy

A

Kinetic, Magnetic, Electrostatic, Nuclear, Light, Sound, Chemical potential, Elastic Potential, Gravitational potential, Thermal Energy

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3
Q

What is potential energy

A

It is when due to the position of atoms or charges it releases energy

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4
Q

What is Internal energy

A

The sum of the K.E and P.E of all the molecules

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5
Q

1MJ

A

X1000000J

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6
Q

1KJ

A

X1000J

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7
Q

J

A

What energy is measured in

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8
Q

1mJ

A

/1000

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9
Q

1 micro J

A

/1000000

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10
Q

What is Kinetic Energy

A

Energy due to a moving object

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11
Q

How to work out kinetic energy

A

1/2MV^2

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12
Q

Example of Elastic Potential energy

A

A compressed spring

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13
Q

How to work out Elastic Potential energy

A

1/2KE^2

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14
Q

What is Gravitational Potential energy

A

The Higher an object is the more gravitational potential energy it stores

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15
Q

How to work out Gravitational potential energy

A

m.g.h

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16
Q

What is gravity’s set number

A

9.8 N/kg

17
Q

When is work done

A

Work done is when a force acts on an object and moves it a distance in the direction of the force

18
Q

How to work out work done

A

W=F x S

19
Q

What is Power

A

The rate at which energy is transferred

20
Q

How to work out power

A

P = E/t, P = W/t

21
Q

What is Specific Heat Capacity

A

The amount of energy required to raise the temprature of a 1Kg substance by 1C

22
Q

What Does the change in Energy =

A

Mass x S.H.C x Change in temperature

23
Q

Is useful energy Concentrated on Unconcentrated

A

Concentrated

24
Q

What Helps Homes Be Efficient

A

Walls, doors, Loft insulation, Glazing windows, Thick Curtains, Carpet with underlay

Physics (6 decks)

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