3 Questions

Questions and Answers

- 1.The frequencies of two tuning forks are 480 cps and 480.05 cps respectively. When sounded together, after how much interval the maximum sound will become half if the minimum intensity is zero ?
- A.
5 s

- B.
10 s

- C.
20 s

- D.
0.025 s

- 2.The Laplace's correction for the expression for the velocity of sound given by Newton was needed because the sound waves
- A.
Are Longitudinal

- B.
Propagate adiabatically

- C.
Propagate isothermally

- D.
Have long wave lengths

- 3.The equation of a wave traveling on a string is given by y = 10 sin [PI] /2 (8t - x/8); where x and y are in cms. The velocity of the wave is
- A.
32 cms in the negative x-direction

- B.
32 cms in the positive x-direction

- C.
64 cms in the negative x-direction

- D.
64 cms in the positive x-direction