Studied by 10 people

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Hint

1

Average speed =

distance/time

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2

Force =

mass x acceleration

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3

Acceleration =

Change in velocity / time taken

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4

Momentum =

Mass x Velocity

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5

Density =

mass/volume

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6

Work done

force x distance moved

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7

Work done =

energy transferred

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8

Kinetic Energy =

1/2 x mass x (speed)^2

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9

Gravitational potential energy =

mass x gravitational field strength x height

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10

Weight =

Mass x gravitational field strength

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11

Gravitational field strength on earth

Assume its 10N/kg, but actually 9.81N/kg.

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12

Pressure =

force/area

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13

moment =

Force x perpendicular distance from pivot

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14

Charge =

current x time

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15

Voltage =

current x resistance

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16

Electrical power =

current x voltage

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17

Wave speed =

frequency x wavelength

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18

Input(primary) voltage/ output(secondary) voltage

primary turns / secondary turns

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19

n =

sin i / sin r

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20

sin c =

1/n

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21

Efficiency =

Useful energy output / total energy input x 100

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22

Pressure difference =

height x density x gravitational field strength

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23

Input power =

output power

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24

Force =

Spring constant x extension

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25

Increasing the voltage means

more current will flow

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26

Increasing the resistance means

less current will flow

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27

Current

Current is the rate of flow of charge round a circuit

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28

Voltage

Voltage is the energy transferred per unit charge passed.

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29

One volt

is one joule per coulomb

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30

Energy transferred =

charge x voltage

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31

Energy transferred =

charge x current x resistance

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32

Live wire (Brown)

Alternates between a High+VE and -VE voltage of about 230V

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33

Neutral Wire (Blue)

Neutral wire is always at 0V

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34

Earth Wire (Green/Yellow)

For safety and work together.

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35

Energy transferred =

current x voltage x time

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36

Frequency =

1/time period

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37

Transverse waves

In Transverse waves the vibrations are perpendicular to the direction the energy is transferred by the wave.

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38

Longitudinal wave

In longitudinal waves the vibrations are parallel as the waves transfer energy.

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39

angle of incidence =

angle of reflection

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40

Principle of conservation of energy

Energy cannot be created or destroyed, it can only be transferred or stored

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41

Conduction

Thermal conduction is the process where vibrating particles transfer energy from their kinetic energy store to the kinetic energy stores of neighbouring particles.

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42

Convection

Convection occurs when the more energetic particles move from the hotter region to the cooler region and transfer energy as they do.

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43

specific heat capacity

The energy required to raise the temperature of one gram of a substance by one degree Celsius

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44

Energy required

mass x specific heat capacity x change in temperature

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45

When a force moves an object through a distance...

Energy is transferred and work is done on the object

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46

Power

Power is the rate at which energy is transferred

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47

Energy lost from the gravitational potential energy store =

Energy gained in the kinetic energy store

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48

Absolute zero

0 Kelvin or -273°C

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49

Kelvin

Temperature in degrees Celsius -273

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50

The temperature of a gas (in kelvins) is proportional to

the average energy in the kinetic energy stores of the particles.

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