Define the term ‘tone’. A person is listening to a sound of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions reaching his ears from the source?
(a) No, the person standing nearby would not be able to hear the whistle as there is no atmosphere on the moon. Sound waves needs medium for travelling, but the...
(c) remains unchanged
Explanation:
If there is no external torque, the angular momentum is conserved. It is true if the moment of inertia of the rotating part of the stool is negligible...
(c) The wavelength of the sound in the medium towards the observer is decreased.
EXPLANATION:
When the source of sound moves towards an observer neither the frequency of the sound nor the...
(a) Frequency.
(d) Time period.
EXPLANATION:
The sound wave propagate due to the vibrations of the particles of the medium (air), though the particles do not move with the wave. When the wind...
Height of fall of balls are given by the equation,
h=ut+½gt² =½gt² (Since u=0)
For the 3rd ball t=3 s, So h=½*9.8*9 =44.1 m below the top of the building.
For...