Physics equations Flashcards
1
Q
pressure in liquid
A
‘rho’gh
2
Q
resultant force
A
change in momentum/change in time
3
Q
energy in a spring
A
(1/2)Fx
4
Q
efficiency
A
[ (useful energy/power) / (total energy/power) ] x 100
5
Q
current
A
change in Q / change in time
6
Q
potential difference
A
energy / charge (E/V)
7
Q
electrical work done
A
power x time
8
Q
resistance
A
( ‘rho’ * l ) / A
9
Q
Malus’ law
A
intensity is proportional to cos ^2 (x)
10
Q
angular velocity
A
r * omega
11
Q
period
A
2*pie / omega
12
Q
electric field strength
A
F/Q
13
Q
Activity
A
-dN/ dt
