The class is about Electricity and Magnetism. The website wants exactly the perfect answer and in the same metric system units that are stated on the calculators that are on the picture for the question, if not, it'll mark it wrong.

Hydrostatic Force on a Dam Water stands at a height h = 21.1 m behind a vertical dam of uniform width b = 105 m. a. Assuming the water behind the dam has uniform density, find the total force of water on the dam. F = N abc sing> Ox10 Submit Reset Reset All .Figure out the infinitesimal force dF on a thin rectangular strip of height dx and width b. Then integrate to find the total force exerted on the dam by the water. b. Suppose the water (or perhaps some other fluid) has a density that varies with depth x as o = cx, where c = 54 kg/m". Find the total force the liquid exerts on the dam. 0. F = N abc sin(x Ox10 Submit Reset Reset All