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Physics > P3 > Flashcards

P3 Flashcards

1
Q

What is condensation?

A

Gas cooled down to liquid

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2
Q

What is density?

A

The amount of mass in a volume. It tells us how tightly matter is packed together

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3
Q

What is evaporation?

A

Liquid to gas after heating

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4
Q

What is freezing?

A

Liquid to solid after cooling

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5
Q

What is gas temperature?

A

The temperature of gas is directly proportional to the average kinetic energy of its molecules

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6
Q

What is the internal energy of something?

A

Energy stored in a system by the particles that make it up

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7
Q

What is the latent heat of something?

A

The energy required for a substance to change state

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8
Q

What is melting?

A

Solid to liquid when heated

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9
Q

What are pascals?

A

The unit of pressure, equal to a force of one Newton acting perpendicular to an area of one metre squared

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10
Q

What are physical changes?

A

Changes to the physical properties of a substance which can be REVERSED. Changes of state are an example of this because they’re reversible

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11
Q

What is pressure?

A

The force acting perpendicular to a surface, per unit area

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12
Q

What is absolute zero?

A

-273 degrees celcius
No particles are moving

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13
Q

What is specific heat capacity?

A

The amount of energy required to raise 1kg of substance by 1 degree

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14
Q

What is the specific latent heat of fusion?

A

Amount of energy to change the state by 1kg of a substance from solid to liquid whilst held at a constant temp

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15
Q

What is specific latent heat of vaporisation?

A

The amount of energy required to change 1kg of a substance from a liquid to a gas state whilst held at a constant temperature

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16
Q

What is sublimation?

A

The change of state from solid to gas without turning into liquid

17
Q

Which state has the highest density?

A

Solids

18
Q

What happens to the mass in changes of state?

A

They’re always conserved

19
Q

What are chemical changes?

A

Changes of state that are not easily reversible

20
Q

What is the unit of pressure?

A

Pascal

21
Q

What is particle motion?

A

Molecules are in constant motion, and the kinetic energy is determined by the temperature of the object (the higher the temp, the higher the kinetic energy)

22
Q

What is particle motion?

A

Molecules are in constant motion, and the kinetic energy is determined by the temperature of the object (the higher the temp, the higher the kinetic energy)

Physics (4 decks)

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