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Physics > Equations Better > Flashcards

Equations Better Flashcards

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1
Q

Kinetic energy

A

1/2 x mass x velocity squared

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2
Q

Gravitational potential energy

A

Mass x height x gravitational field strength

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3
Q

Elastic potential energy

A

1/2 x spring constant x extension squared

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4
Q

Distance

A

Speed x time

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5
Q

Density

A

Mass divided by volume

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6
Q

Power

A

Current x potential difference
Energy transferred divided by time
Work done divided by time
Current squared x resistance

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7
Q

Efficiency

A

Useful energy output divided by total energy input

Useful power output divided by total power input

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8
Q

Change in thermal energy

A

Mass x temperature change x specific heat capacity

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9
Q

Charge flow

A

Current x time

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10
Q

Potential difference

A

Current x resistance

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11
Q

Energy transferred

A

Power x time
Charge flow x potential difference

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12
Q

Thermal energy for a change of state

A

Mass x specific latent heat

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13
Q

Constant in a gas

A

Pressure x volume

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14
Q

Wave speed

A

Frequency x wavelength

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15
Q

Time period

A

1 divided by frequency

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16
Q

Magnification

A

Image size / object size

17
Q

Weight

A

Mass x gravitational field strength

18
Q

Work done

A

Force x distance

19
Q

Force

A

Spring constant x extension

Change in momentum / time taken

magnetic flux density x current x length of conductor in magnetic field

20
Q

Moment of a force

A

Force x distance

21
Q

Pressure

A

Force / area

22
Q

Acceleration

A

Final velocity - initial velocity / time taken

23
Q

Resultant force

A

Mass x acceleration

24
Q

Momentum

A

Mass x velocity

25
Q

Momentum

A

Mass x velocity

26
Q

Pressure

A

height of column x density of liquid x gravitational field strength

27
Q

SUVAT

A

final velocity squared - initial velocity squared = 2 x acceleration x distance

Physics (5 decks)

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