The largest barometer ever built was an oil-filled barometer constructed in Leicester, England in 1991. At an atmospheric pressure of  $1.013\ \ \times\ 10^5$ Pa, height of the oil column was 12.2 m.
Were the barometer filled with water instead of oil, what would be the height of the water at the same atmospheric pressure?

Edwin dives to a depth of 4.00m to get the coin thrown by a friend from the deck of a boat. What is the pressure exerted on Edwin? (Use atmospheric pressure of  $1.0325\ \times\ 10^5Pa$  and gravity of 10m/ $s^2$  )

Edwin dives to a depth of 4.00m to get the coin thrown by a friend from the deck of a boat. What is the force exerted on Edwin's back if its surface area is about  $0.40m^2$  ? (Use your answer in Question 3 to help answer this question. ) 

Which of the following best suit the statement below?

Pressure applied to an enclosed fluid is transmitted undiminished to every point in the fluid and to the walls of the container.

In a car lift, compressed air exerts a force, F₁ on a small piston having a radius of 5.5cm. This pressure is transmitted to a second piston of radius 20cm as shown in figure above. The mass of the car is 1250kg. Acceleration due to gravity g=10ms^-1.

Calculate the pressure on the smaller piston F_1.