Advertisements
Advertisements
प्रश्न
Name five different forms of energy.
उत्तर
The different forms of energy are :
(i) Mechanical energy
(ii) Heat energy
(iii) Light energy
(iv) Chemical energy
(v) Sound energy
(vi) Magnetic energy
(vii) Electrical energy and
(viii) Atomic energy or nuclear energy.
APPEARS IN
संबंधित प्रश्न
Which of the following produces more heat (per unit mass) on burning?
Select the correct alternatives
The energy stored in an electric cell is
Give one example to show the conversion of potential energy to kinetic energy when put in use.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is just in the middle .
Name the form of mechanical energy, which is put to use.
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)
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
Write the type of energy possessed in the following case:
A falling apple
A body of mass 50 kg has a momentum of 3000 kg−1 ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.
Obtain an expression for the kinetic energy of a body of mass m moving with a velocity v?