Answer :
Final answer:
The water pressure at the top of the wall would be less than 143 kPa due to the increase in gravitational potential energy which causes a decrease in pressure when elevation increases.
Explanation:
The question is asking about the change in water pressure when it is moved up a 2.0 m wall. According to the principles of fluid mechanics, specifically Bernoulli's principle, as the elevation of water increases, the pressure exerted by the water decreases if the speed of the water remains constant. Therefore, the answer is (c) Less than 143 kPa. This is because the increase in gravitational potential energy at the higher elevation results in a decrease in pressure.
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