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Equation Recap Flashcards

1
Q

Charge

A

Q = It

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2
Q

Current in terms of charge

A

I =Q/t

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3
Q

Voltage

A

V = IR

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4
Q

Ohms law equation

A

V dp to I so V=IR

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5
Q

Resistance equation

A

R = V/I

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6
Q

Resistors in series equation

A

R1 + R2 + … = totalR

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7
Q

Resistors in parallel

A

1/R1 + 1/R2 all under 1

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8
Q

Force equation

A

F = ma

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9
Q

Acceleration

A

a = v-u/t
Aka 🔺V/ 🔺t (triangle is delta)

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10
Q

Speed on distance time graphs

A

The gradient (s=d/t)

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11
Q

GPE

A

GPE = mgh

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12
Q

KE

A

KE = 1/2mv squared

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13
Q

Work done equation

A

W = fd

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14
Q

Power with energy

A

P= E/t

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15
Q

Efficiency

A

Useful output/total output = %

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16
Q

Energy transferred in a circuit

A

E = IVt

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17
Q

Specific heat capacity

A

E = mc 🔺T

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18
Q

Density

A

Rho = mass / volume
Kg/m3 or g/cm3

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19
Q

Pressure

A

p = F/A

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20
Q

Pressure manometer

A

p = rho gh
density of liquid x 🔺height x gravity (10)

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21
Q

Hooke’s law (effect of forces)

A

F = kx
K = gradient
X = extension

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22
Q

Moments

A

M (torque) = Fd
Force x perpendicular distance from the pivot

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23
Q

Moments unit

A

Nm

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24
Q

Momentum

A

p = mv (mass x velocity)

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25
Force in terms of momentum
F = 🔺p / 🔺t F = change in momentum / time
26
Impulse equation
Impulse = change in momentum = Ft
27
Conservation of moments
Total momentum before = total momentum after
28
Velocity of wave
V = f λ Frequency (Hz) x wavelength (m)
29
Time period for a wave to be made
T = 1/frequency
30
What is the range of human hearing?
20-20,000Hz
31
Law of reflection
angle of incidence = angle of reflection
32
Refractive index
n = sin(i) / sin(r)
33
Critical angle
C = sin-1 (1/n)
34
Transformer equation voltage and current
Ip x Vp = Is x Vs
35
Transformer equation turns and voltage
Vp/ Vs = np/ ns
36
Speed distance time equation
S = d/t
37
Weight equation
W = mg
38
Work done in terms of energy
Energy transferred = work done
39
Resistance equation
R = V/I
40
Isotope notation top number meaning
Protons + neutrons
41
Isotope bottom number meaning
proton number
42
Acceleration equation
a = change in velocity/time
43
Work done equation
W = Fd
44
Power equation
W/t or Fd/t or 🔺energy/t
45
Pressure in a liquid equation
p = h(rho)g
46
Pressure of a gas equation
pV = pV
47
Thermal capacity of an object equation
C = mc Lower c = SHC
48
Specific heat capacity
Energy = mc🔺T
49
Speed of a wave
v = f x wavelength
50
1V = ?
1V = 1J/C
51
Power equation with voltage
P = IV
52
Gravitational field strength equation
g = w/m (N/Kg)
53
Orbital speed equation
Circumference (twoxpixradius) / time (secs)
54
One light year
9.5x10 ^15 m
55
Refractive index with velocity and critical angle
n = c/v
56
Energy charge voltage equation
E = QV
57
Age of the universe equation
d/v = 1/hubbles constant
58
Hubbles constant equation
Ho = v/d
59
Power current equation
P = IV
60
Voltage energy equation
V = E/Q
61
Energy in terms of power
E = Pt
62
Refractive index with critical angle equation
n = c/v
63
Hubbles constant
2.2 x 10^-18
64
1 light year
9.5 x 10^15 m
65
Speed of electromagnet radiation and light
3x10^8m/s
66
The earths axis tilt
23.4°
67
°c -> kelvin
+273
68
Speed of sound in water
900-2000m/s
69
Speed of sound in solid
6000m/s
70
Power resistance equation
P = I squared x R

physics gcse (12 decks)

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