Advertisements
Advertisements
Question
State the energy change in the following device while in use:
A glowing electric bulb.
Solution
Electric to heat energy to light energy.
RELATED QUESTIONS
Fill in the blank
The energy possessed by a body due to its position is called ________ energy.
Fill in the blank
An object falling freely from the roof of a multistorey building has ________ and _________ energy when halfway down the building.
Name the type of energy (kinetic or potential) possessed by the following:
A bullet fired from a gun.
State two uses of solar cells.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
Give one example when:
Mechanical energy to heat energy.
Draw a diagram to show the energy changes in an oscillating simple pendulum. Indicate in your diagram how the total mechanical energy in it remains constant during the oscillation.
What is the form of that graph between
(i) K.E. and velocity for a constant mass?
(ii) K.E. and mass for a constant 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]
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.