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Flashcards in Conservation Of Energy Deck (13):
1

What is the equation for efficiency?

Useful energy output / total energy input

2

List the three ways heat can be transferred

Conduction
Conservation
Radiation

3

How does heat transfer through conduction?

Heat transfers between particles in a solid by colliding with each other

4

How does a convection cycle work?

Air is heated. The hot air becomes less dense and so rises. The air then cools, causing the air to become more dense and so it sinks back towards the heat source

5

How does heat transfer through radiation?

Heats is transferred through EM Waves

6

What are the five factors that affect heat transfer?

Temperature difference
Surface colour
Surface area
Conductivity of material
Thickness of material

7

What is the equation for gravitational potential energy?

Energy = mass x gravitational field strength x change in height

8

What is conservation of energy?

Energy can not be created or destroyed. The total amount of energy in a closed system will not change.

9

What five factors can you compare energy sources on?

Reliability
Cost
Flexibility
Environmental impact
Location

10

What is work done?

Work done is the energy transferred

11

What is the equation for work done?

Work done = force x distance

12

What is power?

Power is the rate of energy transferred

13

What us the equation for power?

Power = work done / time