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Mechanical rotational energy is required to rotate shafts in a factory for driving various machines and also for driving the wheels of vehicles or automobiles or locomotives. The energy of water power is very unequally distributed, some countries such as Norway and Switzerland being rich in it and some such as England poor. England is rich in the potential energy of coal but has little or no oil wells.
Appliances for converting energy from one form to another are called engines. Thus a heat-engine is a machine for converting heat energy into mechanical energy of rotation by the combustion of coal or oil. A turbine or water engine can convert the kinetic energy of falling water into mechanical rotational energy.
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The energy of water power is ___________________.
very unequally flown
very equally distributed
less unequally distributed
very unequally distributed
