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physics > P1.2 > Flashcards

P1.2 Flashcards

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1
Q

What is the formula for density?

A

Mass / volume

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2
Q

What is 1m cubed in cm cubed

A

100,000cm cubed (1 x 10^6)

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3
Q

What are the units for density?

A

Kg/m^3

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4
Q

What is 0 degrees Celsius in kelvin?

A

273 degrees Kelvin

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5
Q

What is 0 degrees kelvin?

A

The point at which particles don’t move at all

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6
Q

Estimate the volume of water in a cup

A

250cm^3

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7
Q

What is specific heat capacity?

A

The heat energy required to raise the temperature of 1kg of a substance by 1 kelvin

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8
Q

What are the units for specific heat capacity?

A

J/KgK - Joules per Kilogram Kelvin

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9
Q

What is the equation for specific heat capacity?

A

Energy supplied = mass of substance x specific heat capacity x temperature change

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10
Q

What does a lower specific heat capacity mean for temperature change?

A

It is easier to increase the temperature

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11
Q

What is latent heat of vaporisation?

A

The amount of heat needed to change 1kg of a liquid to a gas

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12
Q

What is the specific heat capacity of water?

A

4180J/kg degrees Celsius

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13
Q

What are the units for specific heat capacity?

A

J/Kg joules per kilogram degrees Celsius

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14
Q

How many joules are in a megajoule (mj)?

A

1million

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15
Q

How many joules are in a kilojoule (kj)?

A

1000

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16
Q

What is the specific heat capacity of oil?

A

1500j/kg degrees Celsius

17
Q

What is the specific heat capacity of concrete?

A

880j/kg degrees Celsius

18
Q

What is the specific heat capacity of copper?

A

330j/kg degrees Celsius

19
Q

What is the specific heat capacity of aluminium?

A

913 j/kg degrees Celsius

20
Q

What is the action to solid to gas

A

Sublimation

21
Q

What is the act of gas to solid?

A

Depositing

22
Q

What is the latent what of fusion (or melting)?

A

The energy transferred when 1kg of a substance changes from a solid to a liquid or from a liquid to a solid.

23
Q

What do you calculate with specific latent heat?

A

Thermal energy required for a change in state (J) = mass (Kg) x specific latent heat (J/Kg)

24
Q

What is the specific latent heat of fusion for water?

A

334000

25
Q

What is the specific latent heat of fusion for lead?

A

24500

26
Q

What is the specific latent heat of fusion for ethanol?

A

108000

27
Q

What is the specific latent heat of vaporisation for water?

A

2.26 million

28
Q

What is the specific latent heat of vaporisation of lead?

A

871,000

29
Q

What is the specific latent heat of vaporisation for ethanol?

A

855,000

30
Q

What are the units for specific latent heat of fusion or vaporisation?

A

J/Kg

31
Q

How is specific latent heat different from specific heat capacity?

A

Latent heat is about change of state but heat capacity is about change of temperature

32
Q

What is the difference between energy and temperature?

A

The energy in a thermal store is measured in joules (J). It depends on the arrangement of the particles and how fast they are moving or vibrating.
Temperature tells you about the average kinetic energy of the particles.

physics (9 decks)

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