Calculations
What does GPE stand for?
Gravitational potential energy
Name a method of transferring heat energy
Conduction/Convection/Radiation
Name the energy transfer when we burn a potato chip
Chemical PE to heat energy
Name a type of energy
Kinetic Energy, Heat/Thermal Energy, Light Energy, Sound energy, Gravitational PE, Chemical PE, Elastic PE, Magnetic PE, Electrical PE, Nuclear PE
What is potential energy?
Energy that is stored
Efficiency is always given as a....
Percentage (%)
Name the method of heat energy transfer in a vacuum
Radiation
True or False: When particles are heated, they get bigger
False - particles take up more space but are the same size
Name the energy transformation when you switch a lightbulb on
Electrical PE to light energy (+ heat energy)
What is the unit for energy?
Joules (J)
Calculate the percentage efficiency of a speaker if it produces 20 J of sound energy when supplied with 100 J of electrical energy.
20%
Holding a hot water bottle is an example of which type of transfer
Conduction
What is wasted energy?
When energy is transformed into a form you don't want
What is nuclear potential energy?
Energy stored in the nucleus (of an atom)
Name a type of electricity generation station
Fossil fuels/Hydroelectric/Solar/Wind/Geothermal
A bag with a mass of 2 kg sits on a 3 m tall post. What is its GPE?
60 J
Which colour absorbs and emits more infrared radiation?
Black
What is a bimetallic strip?
Two types of metal fused together that expand at different rates
Name the transformation in a generator
Kinetic to electrical PE
Moving a coil in a magnetic field or moving a magnetic field through a wire
A cat of mass 5 kg has 500 J of gravitational potential energy. How high off the ground is it?
10 m
Describe what happens in convection
As a substance is heated, it expands and becomes less dense. The less dense particles will rise above denser particles.
Why do particles expand when heated?
Name all 10 types of energy
Kinetic Energy, Heat/Thermal Energy, Light Energy, Sound energy, Gravitational PE, Chemical PE, Elastic PE, Magnetic PE, Electrical PE, Nuclear PE
What is the Law of Conservation of Energy
Energy is cannot be created or destroyed, only transformed from one form to another