GCSE Flashcards From Past Papers
1
Q
Why must energy be dissipated into another energy store of the surroundings as ….
A
Energy must be conserved
Total = useful + wasted
2
Q
Name 4 magnetic metals
A
Iron (magnetically soft), steel (magnetically hard), cobalt, nickel
3
Q
Name 2 non-magnetic materials
A
Copper, aluminium
4
Q
Describe the Doppler Effect
A
In relation the the driver, the frequency doesn’t change
The frequency for the person on the side of the road changes
Frequency is higher as the car approaches
Because the wavefront are closer together
Frequency is lower as the car moves away
Because wavefronts spread out
Due to the Doppler effect
Frequency = wave speed/wavelength
5
Q
What is red shift
A
A galaxy is moving away from us
Because
