User:Neavonne/Physics
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| 4. (a) Explain what is meant by the term 'pressure'.
With the aid of a labelled diagram, describe a simple experiment using a tall, cylindrical tank to demonstrate that pressure varies with depth in a fluid. 8 marks) (b) An aquarium has a rectangular base that measures 60 cm by 30 cm. Its height is 45 cm and sea water of density 1150 kg/m 3 is used to fill it. (i) Calculate the weight of water in the aquarium and the pressure on a fish at the bottom of the aquarium due to the water alone. (ii) Calculate the pressure on a fish at the bottom of the aquarium if atmospheric pressure of 100 kPa acts on the surface of the water. (12 marks)
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