Question

The temperature of water at the bottom of a large waterfall is higher than that of the water at the top, because
A) the falling water absorbs heat from the sun.
B) KE of the falling water converted into heat.
C) the water at the bottom has greater PE.
D) rocks on the bed of the river given out heat.

Answer 1

Hint: At the waterfall the temperature is different at bottom and is higher and lower temperature at Higher point of the waterfall.
This is based on the conservation of energy. according to this conservation of energy,” energy neither be created nor be destroyed, but it can be converted into one form of energy to the form of energy.” And heat is thermal energy which only depends on the temperature of the body.

Complete step by step solution: Waterfall is a system of water in which very small drops are streaming as a river in the vertical way. We can say it as a river which is flowing in a vertical direction.
Waterfall is commonly performed by the landscape position of Earth on which a river flows and forms a waterfall when delivered by this landscape. It is this at the starting and becomes more by when it reaches the lower point of the Earth surface.

Now consider the energy of a flowing river. When a river is flowing it has a potential energy because the river is always flowing in a streamlined way. When a river flows in a way of waterfall its potential energy is converted into kinetic energy and this new extra formed kinetic energy when it reaches the Earth surface after turning on waterfall converted into heat. Heat increases the temperature of the bottom part of the waterfall.

Since a moving water has both energies (potential energy and kinetic energy) when water starts from its kinetic energy converted into heat. This heat is Greater at the bottom of the waterfall but starts decreasing with the flow of the river.

Note: Heat is in type of energy when a temperature difference occurs between two points then there is heat present. Due to positive heat difference the temperature of the second point increases with respect to the first point and if the head difference is negative then the temperature of the second point it decreases with respect to the first point.