Answer :
The energy the earth receives from the sun in one hour is enough energy to meet worldwide demand for a year
It is possible to change the form of energy. For instance, the body of a person can store chemical energy from food until that person uses it as kinetic energy during labor or play. The kinetic energy of moving water in rivers and the chemical energy held in coal and natural gas can be turned to electrical energy, which can then be transferred to light and heat.
In terms of working energy, these can be classified into two categories:
potential or reserve power
working force or kinetic energy
Energy is the potential for doing labour. Modern civilisation is made possible by the capacity to convert energy between different forms and use it to complete activities. People use energy to move around on foot and by bicycle, operate cars on land and in the sea, cook food on stoves, make ice in freezers, light up our homes and offices, make things, and send people into space.
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