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GCSE Physics > Pressure > Flashcards

Pressure Flashcards

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1
Q

Which is always bigger than the other - Kelvin or degrees?

A

Kelvin

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2
Q

What is absolute zero in Kelvin

A

0 K

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3
Q

What is absolute zero in degrees

A

-273

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4
Q

in ‘p1/t1 = p2/t2’ what do we assume?

A
  • That the volume stays the same

- No gas leaks

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5
Q

What is the formula for change in pressure?

△p

A

△p = ρgh

change in pressure = density x gravitational field strength x height

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6
Q

What is pressure a measure of?

A
  • How spread out a force is
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7
Q

When increasing the size of the force, how does it affect the size of the pressure?

A
  • It also increases it
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8
Q

When increasing the size of the area, how does it affect the size of the pressure?

A
  • It decreases it
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9
Q

What is pressure measured in?

A

Pascals (P)

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10
Q

What is force measured in?

A

Newtons (N)

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11
Q

What is area measured in?

A

metres squared (m²)

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12
Q

What is 1 Pascal?

A

1 Pascal is 1 Newton per metre squared (1N/m²

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13
Q

What is the amount of pressure we are under from the atmosphere?

A

100,000 Pascals

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14
Q

What is the formula involving force, area and pressure?

A

pressure = force / area

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15
Q

What is the formula involving volume, pressure and mass?

A

pressure = mass / volume

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16
Q

What is height measured in?

A

metres (m)

17
Q

What is density measured in?

A

Kilograms per metre cubed (kg / m3)

18
Q

What is gravitational field strength measured in?

A

Newtons per kilogram or metres per second squared

19
Q

In which direction does pressure act in a fluid?

A
  • All directions
20
Q

Where does pressure come from in gases?

A
  • It comes from the collisions between atoms or molecules and their container
21
Q

Where would the line of best fit cross on the x-axis if a graph of pressure against temperature is drawn?

A
  • It would cross at absolute zero (0K or -273°C)
22
Q

What would happen to a gas if it was cooled down and why?

A
  • It would liquefy as its particles lose energy and slow down
23
Q

What happens to particles at absolute zero?

A
  • They all stop moving

GCSE Physics (20 decks)

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