Advertisements
Advertisements
प्रश्न
What is hydro energy?
उत्तर
The kinetic energy possessed by the flowing water is called the water or hydro energy.
APPEARS IN
संबंधित प्रश्न
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:
Wood
Select the renewable and non-renewable sources of energy from the following:
Oil
Give one disadvantage of using a solar cell.
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
What is the main energy transformation that occur in:
Charging of a battery.
State the energy transformation on the following:
Electricity is obtained from wind energy.
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
A body of mass 0.2 kg falls from a height of 10 m to a height of 6 m above the ground. Find the loss in potential energy taking place in the body. [g = 10ms−2]
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.