Chap#08 Waves

Question 1

When sound waves travel from air to water which of these remains constant?

Answer 1

Frequency

Question 2

Two sources of sound are said to be coherent if:

Answer 2

They produce sound waves with zero or constant phase difference at all instant of time

Question 3

The temperature at which the speed of sound becomes double as was at 27°C is:

Answer 3

927° C

Question 4

For the production of beats the two sources must have:

Answer 4

Different frequencies

Question 5

If the amplitude of the sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be:

Answer 5

Decreasing by a factor of 4

Question 6

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are:

Answer 6

Energy and Linear Momentum

Question 7

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string o that instant is:

Answer 7

Straight Line

Question 8

Velocity of sound in a diatomic as is 300 m/sec. What is its rms velocity?

Answer 8

430 m/sec

Question 9

Mechanical waves on the surface of a liquid are:

Answer 9

Both transverse and longitudinal