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प्रश्न
What name is given to the heat energy obtained from hot rocks inside the earth?
उत्तर
Geothermal energy is the heat energy obtained from the fission of radioactive materials present in the hot rocks inside the earth.
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संबंधित प्रश्न
Give one relevant example for the following transformation of energy:
Electrical energy to heat energy.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving bus
A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.
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.)
Select the renewable and non-renewable sources of energy from the following:
Water
State two disadvantages of using wind energy for generating electricity.
MULTIPLE CHOICE TYPE:
The ultimate source of energy is:
(a) wood
(b) wind
(c) water
(d) sun
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
Give one example when:
Light energy changes to chemical energy.
Two bodies, A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.
