3.4 Pressure in liquids

Question 1

Liquid pressure

Answer 1

when you swim underwater water exerts pressure on you. water molecules are pushing on each other and on surfaces,

Question 2

When you squeeze a bag with holes in it why does the water be pushed out

Answer 2

because of the liquid pressure. the water comes straight out of each hole and then falls because of gravity.

Question 3

What does incompressible mean?

Answer 3

Something cannot be compressed (squashed)

Question 4

Which state of matter is incompressible

Answer 4

Liquid

This is because the particles in a liquid are touching each other and there is very little space between them

Question 5

Where is the pressure bigger in a lake

Answer 5

the bottom

the pressure at a particular depth in a liquid depends on the weight of water above it

Question 6

Why does a rubber duck float?

what does this produce

Answer 6

there are more water molecules hitting the bottom of the duck than there are air molecules hitting the top

produces upthrust