Formulas Flashcards

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
mass × gravitational field strength
= weight
26
force × distance (along the line of action of the force)
= Work done | W = F s
27
Force applied to a spring
= spring constant × extension | F = k e
28
moment of a force =
force × distance (normal to direction of force) | M = F d
29
pressure =
force normal to a surface / area of that surface | p = F / A
30
distance travelled =
speed × time | s = v t
31
acceleration =
change in velocity / time taken | a = ∆ v / t
32
resultant force =
mass × acceleration | F = m a
33
momentum =
mass × velocity | = = m v
34
kinetic energy =
0.5 × mass × speed 2 | Ek = 1/2 m v2
35
gravitational potential energy =
mass × gravitational field strength (g) × height | Ep = m g h