Section 1 - Conservation Of Energy Flashcards
What is the equation for efficiency?
Useful energy output / total energy input
List the three ways heat can be transferred
Conduction
Conservation
Radiation
How does heat transfer through conduction?
Heat transfers between particles in a solid by colliding with each other
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
How does heat transfer through radiation?
Heats is transferred through EM Waves
What are the five factors that affect heat transfer?
Temperature difference Surface colour Surface area Conductivity of material Thickness of material
What is the equation for gravitational potential energy?
Energy = mass x gravitational field strength x change in height
What is conservation of energy?
Energy can not be created or destroyed. The total amount of energy in a closed system will not change.
What five factors can you compare energy sources on?
Reliability Cost Flexibility Environmental impact Location
What is work done?
Work done is the energy transferred
What is the equation for work done?
Work done = force x distance
What is power?
Power is the rate of energy transferred
What us the equation for power?
Power = work done / time
