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प्रश्न
Give one example when:
Mechanical energy to heat energy.
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उत्तर
Rubbing of palms.
संबंधित प्रश्न
State the energy change in the following device while in use:
A glowing electric bulb.
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
Name the type of energy (kinetic or potential) possessed by the following:
A compressed spring.
Give one relevant example for the following transformation of energy:
Electrical energy to mechanical energy.
State different forms of potential energy and give one example of each.
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
Give one example when:
Kinetic energy changes to heat energy.
What is nuclear energy? Explain the principle of producing electricity using nuclear energy is a nuclear reactor.
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec2]
