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Physics > P6 molecules and matter > Flashcards

P6 molecules and matter Flashcards

1
Q

Density Definition

A

How much mass is in a certain volume

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2
Q

Density Equation

A

Density = mass/volume

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3
Q

Archimedes Principle

A

If an object is submerged in a liquid, the level of the liquid will rise. The volume of liquid displaced will be equal to the volume of the object submerged.

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4
Q

1m^3

A

1,000,000 ml

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5
Q

Eureka can practical

A

Find mass of object
Fill eureka can with water
Place measuring cylinder under spout
Put object in water
Record volume of water in cylinder
Divide mass by volume

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6
Q

Purpose of eureka can practical

A

Find density of irregular objects

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7
Q

Solid to liquid

A

melting

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8
Q

Liquid to gas

A

Boiling

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9
Q

Solid to gas

A

Sublimation

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10
Q

Gas to liquid

A

Condensation

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11
Q

Liquid to solid

A

Freezing

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12
Q

Gas to solid

A

Deposition

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13
Q

Boiling

A

Happens at any part of the substance
Only happens above boiling point

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14
Q

Evaporating

A

Only happens at the surface
Very slow
Occurs at any temperature

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15
Q

Latent Heat

A

The energy transferred to a substance when it changes state

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16
Q

Does a substance change temperature during a state change?

A

No, the thermal energy is transferred to make or break intermolecular bonds

17
Q

Internal Energy

A

The energy stored by the particles of a substance

18
Q

Kinetic Energy

A

Individual motions of the particles
Relates to temperature
The more they vibrate, the more kinetic energy they have

19
Q

Potential Energy

A

Individual positions relative to each other
It is related to the change of state

20
Q

Equation of internal energy

A

Internal Energy = Kinetic + Potential

21
Q

Specific Latent Heat

A

The energy transferred per kg when a substance changes state

22
Q

Latent heat of fusion

A

melting/ freezing

23
Q

Latent heat of vaporisation

A

boiling/ condensing

24
Q

Equation for latent heat

A

E=mL
Energy = mass x specific latent heat

25
Q

Absolute zero

A

when pressure = 0
approximately -273°c
where kelvin scale starts

26
Q

Atmospheric pressure

A

100kPa

Physics (5 decks)

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