A diver is exploring a coral reef off the coast of Barbados at a depth of 20 m below the surface of the sea. The density of sea water is 1030 kg/m³ and g = 10 N/kg. What is the pressure due to the water at this depth?

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Question

A diver is exploring a coral reef off the coast of Barbados at a depth of 20 m below the surface of the sea. The density of sea water is 1030 kg/m³ and g = 10 N/kg. What is the pressure due to the water at this depth?

Accepted Answer

206 000 Pa — Award 1 mark for correct answer. Pressure = ρgh = 1030 × 10 × 20 = 206 000 Pa. B is incorrect because it omits the density factor. D is incorrect because it uses only half the depth. A is incorrect because it divides by 20 instead of multiplying.

Answer

103 000 Pa

Answer

20 600 Pa

Answer

10 300 Pa

Answer

206 000 Pa

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