# Definitions

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• Created by: 3mily05
• Created on: 28-09-19 19:03
Definitions:
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Specific heat capacity
The amount of energy needed to change the temperature of 1kg of a substance by 1oc.
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Power
The rate of energy transfer, measured in Watts, W.
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Law of conservation of energy
Energy cannot be created or destroyed. It can only be transferred, stored or dissipated.
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Dissipated
When energy spreads out into the atmosphere.
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Energy efficiency
The percentage or ratio of useful energy transferred compared to total energy in a system. It is not the amount of useful energy.
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Renewable energy resource
The energy resource will not run out or can be produced as quickly as it is being used.
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Non-renewable energy resource
The energy resource is limited and will run out. It is being used up faster than it can be produced.
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Power Equation
Power = energy ÷ time
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Efficiency Equation 1 - Energy
Efficiency = useful energy out ÷ total energy in (x100)
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Efficiency Equation 2 - Power
Efficiency = useful power out ÷ total power in (x100)
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Equations:
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## Other cards in this set

### Card 2

#### Front

The amount of energy needed to change the temperature of 1kg of a substance by 1oc.

#### Back

Specific heat capacity

### Card 3

#### Front

The rate of energy transfer, measured in Watts, W.

### Card 4

#### Front

Energy cannot be created or destroyed. It can only be transferred, stored or dissipated.

### Card 5

#### Front

When energy spreads out into the atmosphere.