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?
A
the pressue is reduced
B
the sound waves are pumped out
C
the waves are absorbed in the inner walls
D
There is no more material medium
E
the air is disturbed
Verified Correct Answer: D.
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #33414)