Equations Flashcards
1
Q
Kinetic energy
A
1/2 x height x speed’2
2
Q
Gravitational potential energy
A
Gravitational field strength x mass x height
3
Q
Power- energy
A
Work done ÷ time taken
energy transferred ÷ time taken
4
Q
Efficiency
A
Useful power output ÷ total power input
Useful energy output ÷ total energy input
5
Q
Charge flow
A
Current x time
6
Q
Potential difference
A
Current x resistance
7
Q
Total resistance
A
Resistance of component 1 + resistance of component 2
8
Q
Power
A
(Current)’2 x resistance
Current x potential difference
9
Q
Energy transferred
A
Charge flow x potential difference
or
Power x time
10
Q
Density
A
Mass ÷ volume
11
Q
Wave speed
A
Frequeny x wavelength
