Iguazu Falls on the border between Brazil and Argentina is 82 m high. What is the kinetic energy of a kilogram of water just before it hits the bottom of the falls. Assume the water is moving very slowly at the top of the falls.

K = 803.6 J

Explanation:

Assuming that the water is moving very slowly at the top of the falls, we can treat to the mass of water as dropping from the top.So, all the energy at that point is just gravitational potential energy.Assuming no friction during the fall, total mechanical energy must be conserved, as follows:ΔK + ΔU = 0 (1)Taking the bottom of the falls as our zero reference level for the gravitational potential energy, we get, Uf =0.From (1), we get:ΔK = -ΔU⇒ ΔK  = - (0 -m*g*h) = m*g*h⇒ ΔK = 1 kg*9.8 m/s2*82 m = 803.6 JKf = 803.6 J

The characteristics of groundwater is said to be: are weak turbiditya constant temperaturechemical composition and almost overall absence of oxygen.

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