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physics gcse > Equation Recap > Flashcards

Equation Recap Flashcards

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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
Q

Force in terms of momentum

A

F = 🔺p / 🔺t
F = change in momentum / time

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26
Q

Impulse equation

A

Impulse = change in momentum = Ft

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27
Q

Conservation of moments

A

Total momentum before = total momentum after

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28
Q

Velocity of wave

A

V = f λ
Frequency (Hz) x wavelength (m)

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29
Q

Time period for a wave to be made

A

T = 1/frequency

30
Q

What is the range of human hearing?

A

20-20,000Hz

31
Q

Law of reflection

A

angle of incidence = angle of reflection

32
Q

Refractive index

A

n = sin(i) / sin(r)

33
Q

Critical angle

A

C = sin-1 (1/n)

34
Q

Transformer equation voltage and current

A

Ip x Vp = Is x Vs

35
Q

Transformer equation turns and voltage

A

Vp/ Vs = np/ ns

36
Q

Speed distance time equation

A

S = d/t

37
Q

Weight equation

A

W = mg

38
Q

Work done in terms of energy

A

Energy transferred = work done

39
Q

Resistance equation

A

R = V/I

40
Q

Isotope notation top number meaning

A

Protons + neutrons

41
Q

Isotope bottom number meaning

A

proton number

42
Q

Acceleration equation

A

a = change in velocity/time

43
Q

Work done equation

A

W = Fd

44
Q

Power equation

A

W/t or Fd/t or 🔺energy/t

45
Q

Pressure in a liquid equation

A

p = h(rho)g

46
Q

Pressure of a gas equation

A

pV = pV

47
Q

Thermal capacity of an object equation

A

C = mc
Lower c = SHC

48
Q

Specific heat capacity

A

Energy = mc🔺T

49
Q

Speed of a wave

A

v = f x wavelength

50
Q

1V = ?

A

1V = 1J/C

51
Q

Power equation with voltage

A

P = IV

52
Q

Gravitational field strength equation

A

g = w/m (N/Kg)

53
Q

Orbital speed equation

A

Circumference (twoxpixradius) / time (secs)

54
Q

One light year

A

9.5x10 ^15 m

55
Q

Refractive index with velocity and critical angle

A

n = c/v

56
Q

Energy charge voltage equation

A

E = QV

57
Q

Age of the universe equation

A

d/v = 1/hubbles constant

58
Q

Hubbles constant equation

A

Ho = v/d

59
Q

Power current equation

A

P = IV

60
Q

Voltage energy equation

A

V = E/Q

61
Q

Energy in terms of power

A

E = Pt

62
Q

Refractive index with critical angle equation

A

n = c/v

63
Q

Hubbles constant

A

2.2 x 10^-18

64
Q

1 light year

A

9.5 x 10^15 m

65
Q

Speed of electromagnet radiation and light

A

3x10^8m/s

66
Q

The earths axis tilt

A

23.4°

67
Q

°c -> kelvin

A

+273

68
Q

Speed of sound in water

A

900-2000m/s

69
Q

Speed of sound in solid

A

6000m/s

70
Q

Power resistance equation

A

P = I squared x R

physics gcse (12 decks)

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