The sound from a bell in an enclosed jar gradually faints...
The sound from a bell in an enclosed jar gradually faints away while the jar is being evacuated. Which of the following explains this observation?
the pressure is reduced
the sound waves are pumped out
the waves are absorbed in the inner walls
There is no more material medium
the air is disturbed
Correct answer is D
No explanation has been provided for this answer.
An air bubble of volume 2 cm\(^3\) is formed 20m under water. What will be its volume when it r...
A vector quantity can only be completely described when ……… and …………are mentioned....
Ripple in a power supply unit is caused by ...
When the linear momentum of a body is constant, the net force acting on it ...
An equipment whose power is 1500W and resistance is 375 ohms would draw a current of ...
Lodestone is a natural magnet, it points at ...