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प्रश्न
Name the device or machine which convert :
light energy into heat energy.
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उत्तर
A solar water heater converts light energy into heat energy.
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संबंधित प्रश्न
A ball of mass 0.20 kg is thrown vertically upwards with an initial velocity of 20 m s-1. Calculate the maximum potential energy it gains as it goes up.
A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate:
- the potential energy at the greatest height,
- the kinetic energy on reaching the ground, and
- the total energy at its half-way point.
What kind of energy is possessed by the following?
A stone kept on roof-top _______________
What type of energy is possessed : by the stretched rubber strings of a catapult?
An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass 3.5 kg. Both the spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same :
What kind of energy transformation take place at a hydroelectric power station?
Name the energy transfers which occur when an electric ball rings.
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
Which one of the following is not the unit of energy?
In the case of negative work, the angle between the force and displacement is
