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6. what is the angle of incidence equal to?
- the angle from the mirror to the normal
- the angle of refraction
- the angle of reflection
- the sine rule of the angle
7. in what state do the particles have the most energy?
8. what is the definition of u-value?
- the measure of how effective a material is as an insulator
- the value of how much it costs to pay a material back compared to the amount of money it saves
- it measures the cost of an electrical device
9. What, apart from particles carries kinetic energy through metals?
- protons
- free electrons
- neutrons
- the current
10. why is the voltage stepped up for long- distance transportation in cables?
- it's cheaper
- it makes the journey faster
- because less energy is lost
- it's easier to transport the energy
11. which type of fuel is non-renewable?
- geothermal energy
- nuclear power
- hydro-electric power
- biofuels
12. what is a reflected image?
13. how do we know if an image is virtual?
- the image is larger
- the image cannot be projected onto a screen
- the image is smaller
- the image doesn't look real
14. What is the national grid?
- the cables that connect homes to power stations
- the telephone wires that connect homes to eachother
- a system of power stations, cables and transformers
- all the power stations in the UK
15. what wave is a transverse wave?
16. what voltage is supplied to homes?
17. what is power measured in?
- coulombs
- amps
- watts
- joules
18. what is a property of a transverse wave?
- they can reflect and refract
- they can only travel through particles
19. what objects lose heat faster?
- objects with a large surface area
- shiny objects
- objects with a small surface area