Part 1
1. The density of water is 1000 kg/m3. Calculate the pressure at the bottom of a dam 12 m deep
Pressure=……………………….
2. The pressure due to the liquid on an object immersed in that liquid is 4500 Pa.
The density of the liquid is 900 kg/m3.
What is the depth of the object below the surface of the liquid?
Depth=…………………………..
3. An object is 60 cm below the surface of a liquid. The pressure due to the liquid at this depth is 9000 Pa.
What is the density of the liquid?
Density=………………………..
AFL
4. It is dangerous for submarines to dive to very great depths.
Why is it dangerous?
A) The density of water is less at greater depths.
B) The pressure of water is greater at greater depths.
C) The temperature of water is higher at greater depths.
D) The weight of the submarine is greater at greater depths.
5. The diagram shows three different containers J, K and L. Each container contains water of the same
depth.
Which statement about the pressure of the water on the base of each container is correct?
A) The water pressure is greatest in container J.
B) The water pressure is greatest in container K.
C) The water pressure is greatest in container L.
D) The water pressure is the same for all three containers
6. Fig. shows two water tanks P and Q of different shape. Both tanks are circular when viewed from above.
The tanks each contain the same volume of water. The depth of water in both tanks is 1.4 m.
(i)
The density of water is 1000 kg / m3. The pressures exerted by the water on the base of the two
tanks are equal. Calculate this pressure.
pressure = ...............................................
7. Fig. 3.1 shows an oil tank that has a rectangular base of dimensions 2.4 m by 1.5 m.
The tank is filled with oil of density 850 kg / m3 to a depth of 1.5 m.
(a) Calculate (i) the pressure exerted by the oil on the base of the tank,
(ii)
pressure = .................................................................
the force exerted by the oil on the base of the tank.
force = .................................................................
8. Fig. shows a side view of a large tank in a marine visitor attraction.
(a) The pressure at point M, halfway down the large viewing panel, is 60 kPa.
Calculate the depth of M below the surface of the water.
depth = .................................................
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