Pressure

Question 1

What is pressure?

Answer 1

P (Pa) = F (N) / A (m^2)
Force applied over an area

Question 2

What is the hydrostatic pressure?

Answer 2

Pressure in fluid

P(pa) = density x g x h (depth of water)

Add atmospheric pressure

Question 3

What is a fluid?

Answer 3

Any substance that cannot maintain its own shape - can flow

Question 4

Where is P equal?

Answer 4

At any point at depth h

Question 5

What measures pressure?

Answer 5

Barometer

Question 6

What is Pascal’s principle?

Answer 6

The pressure applied to a fluid is transmitted undiminished to every part of the fluid

Question 7

Piston equations

Answer 7

F1 / A1 = F2 / A2

Question 8

What is the Archimedes principle?

Answer 8

Object in fluid experiences and upwards or buoyancy force

F = Area x density x g x (h2 - h1)

Upward force = weight of displaced fluid

Question 9

When does an object float?

Answer 9

Buoyancy force > weight of object

Question 10

How to determine the volume or pressure of semi-submerged items?

Answer 10

Vs / V = ρi / ρw