Pressure

Question 1

How do you calculate the pressure?

What are the measurements?

Answer 1

pressure = force / area

N/m2 N m2

Question 2

What is 1 N/m2 equal to?

Answer 2

1 pascal (Pa)

Question 3

What is a fluid?

Answer 3

a substance that can flow

Question 4

What is browian motion?

Answer 4

evidence for the random movement of particles within a liquid or gas

the larger smoke particles get knocked by the smaller particles within the gas causing them to move

Question 5

What does normal mean?

Answer 5

perpendicular (at a right angle)

Question 6

Fill the gaps :

• particles within a fluid have ______ movement
• particles _____ with the _______ of objects or the ______ of containers
• the particles colliding with the surface causes a force _____ to the surface
• the pressure is equal to this force divided by the ____ it’s acting on (force per unit ____)

Answer 6

• particles within a fluid have random movement
• particles collide with the surfaces of objects or the surfaces of containers
• the particles colliding with the surface causes a force normal to the surface
• the pressure is equal to this force divided by the area it’s acting on (force per unit area)

Question 7

How do you calculate the pressure at a certain depth of a liquid?

Answer 7

pressure = height/depth x density x gravitational field strength
(Pa) (m) (kg/m3) (N/Kg)

Question 8

What is the relationship between pressure and depth?

Fill the gaps:

• as the depth increases, the pressure _________ (a ______ relationship)
• this is because the ______ you go, the more ________ are ______ you

Answer 8

• as the depth increases, the pressure increases (a linear relationship)
• this is because the deeper you go, the more particles are above you