Pressure & Motion Flashcards

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1
Q

How do you inflate a balloon ?

A

The collisions between the air molecules and the balloon produce gas pressure.

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2
Q

What happens when you change the volume ?

A

When you squash a gas into a smaller volume there will more collisions between the gas molecules and the walls of the container. The pressure increases.

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3
Q

what happens to the speed of gas molecules when the temperature goes down ?

A

Fewer and less energetic collisions.

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4
Q

What happens to the speed of gas molecules when the temperature goes up ?

A

More collisions that are more energetic.

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5
Q

What is relative motion ?

A

Relative motion means how fast one thing is travelling compared to another.

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6
Q

What is a distance time graph ?

A

A distance time graph is a useful way of showing how something moves.

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7
Q

How do you find the average speed ?

A

Average speed = total distance divided by total time.

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8
Q

How do find the pressure ?

A

Pressure = Force divided by Area

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9
Q

What is liquid pressure ?

A

Liquid pressure is when you swim underwater the water exerts a pressure on you. The water molecules are pushing on each other and on surfaces, and this liquid pressure acts in all directions.

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