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GCSE (Yr10-11) > Physics: Paper 1 > Flashcards

Physics: Paper 1 Flashcards

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1
Q

What is the equation for Kinetic Energy

A

1/2 x mass x velocity^2

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2
Q

Elastic Potential energy

A

1/2 x spring constant x extension^2

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3
Q

Gpe

A

mass x gravitational field strength x height

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4
Q

Gravitational field strength on earth

A

9.8 N

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5
Q

Specific Heat Capacity (J/C/kg)

A

The amount of energy needed to raise the temperature of 1kg of a subsatance by 1 deg

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6
Q

Power (Watt (W))

A

The rate at which energy is transferred

power = work done/time

power = energy transferred/time

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7
Q

Chemical energy stores

A

Food
Fuel
Batteries

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8
Q

Law of energy conservation

A

Energy cannot be created or destroyed

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9
Q

Waste energy

A

Energy that is not used by the device for its desired purpose

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10
Q

Efficiency

A

= Useful output/ total output

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11
Q

How can efficiency be increased?

A

Reducing waste output - lubrication, thermal insulation
Recycling waste output

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12
Q

What is a renewable energy source?

A

an energy source that can be replenished as it is being used up

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13
Q

Examples of renewable energy

A

Wind
Hydro-electric
Tidal
Solar

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14
Q

Advantages of generating power using gas rather than coal

A

Gas power stations have shorter start-up times
Lower emissions of CO2

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15
Q

Disadvantages of using renewable energy

A

Supply is uncertain as it relies on external factors
Often economically beneficial to generate power through other means

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16
Q

Environmental impact of burning fossil fuels

A

CO2 contributes to the greenhouse effect, and causes global warming
Sulphur Dioxide leads to acid rain

17
Q

Advantages of fossil fuels as an energy resource

A

Reliable
Can produce large amounts
Cost-effective

18
Q

Advantages of nuclear power

A

Large amounts of energy from small quantities of fuel
Doesn’t release greenhouse gases
Low fuel costs

19
Q

Disadvantages of nuclear power

A

Produces nuclear waste
Non renewable
Risk of nuclear accidents

20
Q

How does hydroelectric power produce energy

A

Rainwater collects behind a dam
When this water is released, it is used to turn a turbine
Turbine turns a generator which produces electricity

21
Q

Disadvantages of using biofuels

A

Releases CO2
Reduces land available for growing food

22
Q

Advantages of tidal energy

A

No greenhouse gas production
Reliable as tides happen twice a day
Cheap

23
Q

Disadvantages of hydroelectric power

A

Dam may cause flooding
expensive

24
Q

Advantages of Solar panels

A

No harm to environment
Renewable
Can be used in remote areas

GCSE (Yr10-11) (7 decks)

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