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Physics Flashcards

1
Q

Absolute humidity

A

Mass of water vapour present in a volume of gas at a given temperature (kg m-3)

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2
Q

Relative humidity

A

Ratio of water vapour present in the gas relative to the max amount of water vapour the gas could contain (%)

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3
Q

Absolute zero

A

Lowest possible T and all thermal motion stops = 0K and -273C

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4
Q

Ampere

A

Amount of electric charge passing a given point per unit time (1 coulomb per second)

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5
Q

Coulomb

A

Amount of charge passing a given point per second when 1A of current is flowing

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6
Q

Boiling point

A

Temperature at which vapour pressure of a liquid equals surrounding ambient pressure and the liquid changes to vapour

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7
Q

Calorie

A

Amount of energy required to increase the temperature of 1g of water by 1C
1 calorie = 4.16J

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8
Q

Candela

A

Luminous intensity of light in a given direction of a source that emits monochromatic radiation of frequency 540x10 to the 12 hertz and radiant intensity of 1/683 watts per second

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9
Q

Critical temperature

A

Temperature at which a gas cannot be liquefied by pressure alone

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10
Q

Freezing point

A

Temperate at which liquid and solid are in equilibrium at a given pressure

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11
Q

Force

A

Mass x acceleration
Change state of motion
1N is force required to accelerate 1kg at a rate of 1 m per second squared

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12
Q

Gas

A

Substance above critical T

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13
Q

Heat capacity

A

Amount of heat required to raise the T of an object by 1C

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14
Q

Hertz

A

1 cycle per second

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15
Q

Joule

A

Work done to an object when applying a force of 1N through a distance of 1m

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16
Q

Kelvin

A

1/273 of the thermodynamic scale temperature of the triple point of water

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17
Q

Kilogram

A

Piece of platinum alloy in Sevres

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18
Q

Kinetic energy

A

Energy a body processes because of motion

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19
Q

Latent heat

A

Energy released or absorbed by a substance when it changes phase at a given temperature

20
Q

Latent heat of fusion

A

Amount of heat required to convert a unit mass of solid at its melting point into a liquid without an increase in temperature

21
Q

Latent heat of vaporisation

A

Amount of heat required to convert a unit mass of a liquid at its boiling point into a vapour without an increase in temperature

22
Q

Mass

A

Amount of matter contained in a body
Kg

23
Q

Metre

A

Length of the path travelled by light in a vacuum during the time interval of 1/300,000,000 of a second

24
Q

Mole

A

Quantity containing the same number of particles as there are atoms in 12g of carbon 12. 6.022x10 to 23

25
Q

Momentum

A

Mass x velocity

26
Q

Ohm

A

Resistance between two points of a conductor when a PD of 1 volt is applied to produce a current of 1amp

27
Q

Pascal

A

1Pa = 1N over 1m3

28
Q

pH

A

Negative logarithm to the base 10 of hydrogen ion concentration in a solution

29
Q

Potential energy

A

Energy of a body or a system to do work

30
Q

Power

A

1J per second
Rate or doing work

31
Q

Resistance

A

Property of a conductor to oppose flow

32
Q

SVP

A

Pressure exerted by a vapour when in equilibrium with its liquid phase within a closed system at a given temperature

33
Q

Second

A

Frequency of radiation emitted by caesium-133 in its ground state

34
Q

Specific heat capacity

A

Amount of energy required to raise the temperature of 1kg of a substance by 1C

35
Q

Specific latent heat of vaporisation

A

Amount of heat required to convert a unit mass of liquid at its boiling point into a gas without an increase in temperature at a given pressure

36
Q

Triple point of water

A

Temperate and pressure at which water exists as liquid, solid and gas

37
Q

Vapour

A

Substance in the gas phase below its critical temperature

38
Q

Volt

A

PD between two points of a conducting wire when 1 joule of work is done to move 1 coulomb between two points of the conducting wire
1 volt will push a current of 1amp through a resistance of 1 ohm

39
Q

Weight

A

Gravitational force acting on an object
Mass x gravitational acceleration (9.81ms-2)

40
Q

Critical temperature

A

Temperature above which a substance cannot be liquefied no matter how much pressure is applied

41
Q

Critical pressue

A

Pressure required to liquefy a gas at its critical temperature

42
Q

Pseudo critical temperature

A

Mixture of gases in which individual gases may separate out in to constituents

43
Q

Poynting effect

A

Gases dissolved with each other behave different than would be expected from their individual properties

44
Q

Fluid

A

Substance capable of changing its shape when acted on by an external force

45
Q

Density

A

Mass of a substance occupying a unit volume

46
Q

Viscosity

A

Fluid property that causes it to resist flow

RCoA (25 decks)

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