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Flashcards in Conservation Of Energy Deck (18)
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1

What is the equation for Gravitational Potential Energy?

Gravitational Potential Energy = Mass x Gravitational Field Strength x Height

2

What is the equation for Kinetic Energy?

Kinetic Energy = 0.5 x mass x velocity squared

3

Explain what is meant by conservation of energy.

Total energy before is equal to total energy after a transfer. Or energy cannot be created or destroyed.

4

What is the energy transfer when an object is throw vertically upwards?

Kinetic into gravitational

5

What is the energy transfer when a moving object collided with an obstacle coming to a stop?

Kinetic into heat and sound

6

What is the energy transfer when a falling mass accelerates a trolley?

Gravitational into Kinetic (and sound and heat)

7

What is the energy transfer when boiling a kettle?

Electrical into heat (and sound)

8

What is the main form of wasted energy?

Heating of the surroundings

9

Explain ways of reducing unwanted energy.

Lubrication and insulation

10

Describe the effects of thickness and thermal conductivity of the walls of a building on its rate of cooling

The thicker the wall and the better the insulation the less the building will cool

11

What is meant by a renewable energy source?

Will not run out

12

What is meant by a non-renewable energy source?

Will run out

13

Explain the 5 main stages of a fossil fuel power station.

1) Burn fuel to produce heat
2) Boil water to produce steam
3) Steam turns turbines
4) Turbines turn the generators
5) Generators produce electricity

14

What is the name of the process that produces heat in a nuclear power station?

Nuclear Fission

15

What is the main environmental effect of using fossil fuels?

CO2 leads to climate change

16

What is the main environmental effect of Nuclear Power?

Nuclear waste is extremely hazardous and must be stored very carefully

17

What is the main disadvantage of wind, solar and wave energy resources?

Unreliable. Will only produce energy when weather allows it

18

Which renewable energy resources can respond to demand?

Geothermal, Hydro Electric and tidal