Equations Flashcards
1
Q
How do you find refractive index?
A
n = sin i
—–
sin r
2
Q
Relationship between refractive index and critical angle?
A
n = 1/sin c
3
Q
GPE equation
Kinetic energy equation
What is link between them
A
GPE = mgh
KE = 1/2mv^2
If all GPE converted to KE then:
gh = 1/2(v^2)
4
Q
Work done equation?
A
Wd = Fd
5
Q
Power equation?
A
P = Wd/t
6
Q
Wave equation
A
V = f lambda
Wave speed = frequency*wavelength
f = 1/T T = 1/f
7
Q
General force equation
A
F = ma
8
Q
Weight equation
A
W = mg
9
Q
Moment equations?
A
moment = F x perpendicular distance from pivot
Sum anticlockwise moment = sum clockwise
10
Q
Power electricity equations?
A
P = IV P = I^2 x R P = V^2 / R
11
Q
Energy electricity equations?
A
E = Pt E = IVt
12
Q
Charge and potential difference equations
A
Q = It V = IR
13
Q
Density equation
A
p = m/v
14
Q
Pressure equation
Pressure difference in liquids
A
p = F/A
p = hpg
15
Q
Boyle’s law
A
P1V1 = P2V2
