Formulas Flashcards

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1
Q

pressure due to a column of liquid =

A

height of column × density of liquid
× gravitational field strength (g)
(p = h ρ g)

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2
Q

final velocity 2 – initial velocity 2 =

A

2 × acceleration × distance

v2 – u2 = 2 a s

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3
Q

For gases: pressure × volume

A

= constant

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4
Q

Mass × specific latent heat

A

Thermal energy for a change of state

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5
Q

potential difference across primary coil / potential difference across secondary coil

A

= number of turns in primary coil / number of turns in secondary coil

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6
Q

mass × specific latent heat

A

thermal energy for a change of state

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7
Q

Period

A

= 1 / frequency

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8
Q

Mass × specific heat capacity

× temperature change

A

= Change in thermal energy

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9
Q

Period

A

= 1 / frequency

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10
Q

Mass × specific heat capacity

× temperature change

A

= Change in thermal energy

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11
Q

force =

A

change in momentum / time taken

F = m ∆ v / ∆ t

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12
Q

elastic potential energy =

A

0.5 × spring constant × (extension) 2

(Ee = 1/2 k e2

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13
Q

density =

A

mass / volume

ρ = m / V

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14
Q

energy transferred =

A

charge flow × potential difference

E = Q V

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15
Q

energy transferred =

A

power × time

E = P t

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16
Q

power =

A

(current) 2 × resistance

(P = (I)2 R

17
Q

power =

A

potential difference × current

P = V I

18
Q

potential difference =

A

current × resistance

V = I R

19
Q

charge flow =

A

current × time

Q = I t

20
Q

wave speed =

A

frequency × wavelength

v = f λ

21
Q

efficiency =

A

useful power output / total power input

22
Q

efficiency = (energy transfer)

A

useful output energy transfer / total input energy transfer

23
Q

power =

A

work done / time

P = W / t

24
Q

power (transferred)=

A

energy transferred / time

P = E / t

25
Q

mass × gravitational field strength

A

= weight

26
Q

force × distance (along the line of action of the force)

A

= Work done

W = F s

27
Q

Force applied to a spring

A

= spring constant × extension

F = k e

28
Q

moment of a force =

A

force × distance (normal to direction of force)

M = F d

29
Q

pressure =

A

force normal to a surface / area of that surface

p = F / A

30
Q

distance travelled =

A

speed × time

s = v t

31
Q

acceleration =

A

change in velocity / time taken

a = ∆ v / t

32
Q

resultant force =

A

mass × acceleration

F = m a

33
Q

momentum =

A

mass × velocity

= = m v

34
Q

kinetic energy =

A

0.5 × mass × speed 2

Ek = 1/2 m v2

35
Q

gravitational potential energy =

A

mass × gravitational field strength (g) × height

Ep = m g h