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Physics P1 > P1.2 > Flashcards

P1.2 Flashcards

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1
Q

more dense =

A

more atoms per “area”

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2
Q

what is density?

A

Density is a property of matter, and it tells us the mass per unit volume

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3
Q

What does specific heat capacity link?

A

Specific heat capacity links thermal energy and temperature of matter

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4
Q

What is specific heat capacity?

A

The amount of energy needed to raise the temperature of 1 kg of substance by 1° C

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5
Q

What is specific latent heat?

A

The energy needed to melt/boil 1 kg of a substance

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6
Q

What is melting in terms of specific latent heat?

A

Fusion

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7
Q

What is boiling in terms of specific latent heat?

A

Vaporisation

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8
Q

What happens to the atoms during a change of state?

A

Their structure does not change and the mass of the material does not change (mass is conserved)

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9
Q

What type of change is a change of state?

A

A physical change

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10
Q

Equation for density

A

Density = mass / volume

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11
Q

What is density measured in?

A

g/cm^3

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12
Q

What does a solid do in liquid?

A

The solid floats, if it is less dense than the liquid

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13
Q

Archimedes principle

A

Water displaced by an object will have the same volume

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14
Q

What is the particle formation like in a solid?

A

The particles in a solid are close together with a small volume and so they are dense

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15
Q

What is the particle formation for a liquid?

A

The particles in a liquid of further apart with a larger volume and so they are less dense

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16
Q

What is the particle formation for a gas?

A

The particles in the gas are far apart with a large volume and so they are not very dense

17
Q

What is the formula for kinetic energy?

A

KE = 1/2 x mass x v^2

18
Q

What is the formula for thermal energy using specific heat capacity?

A

thermal energy = mass x specific heat capacity x change in temperature

19
Q

What is specific heat capacity measured in?

A

J/kg°C

20
Q

What is thermal energy measured in?

A

Joules

21
Q

When you heat up a substance, what happens?

A

The particles speed up, and they gain kinetic energy

22
Q

When you melt/boil a substance, what happens?

A

The particles are more free and the particles gain potential energy

23
Q

What is the formula for thermal energy using specific latent heat?

A

thermal energy = mass x specific latent heat

24
Q

What is specific latent heat measured in?

A

J/kg

25
Q

What is the name of the force that keeps an object afloat?

A

upthrust

Physics P1 (3 decks)

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