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Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
Name the type of energy (kinetic or potential) possessed by the following:
A bullet fired from a gun.
Name the type of energy (kinetic or potential) possessed by the following:
Water flowing in a river.
Give one relevant example for the following transformation of energy :
Chemical energy to light energy.
Select the renewable and non-renewable sources of energy from the following:
Water
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
Name the energy changes for each of the following cases:
dynamo
State the energy changes which take place when:
In a heat engine.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
The major problem in harnessing nuclear energy is how to
