Speed of a Sound Wave

Q.

What is the SI unit of intensity of sound?

Q. Speed of sound depends on which of the following?

1. Temperature of the medium
2. Amplitude of the sound
3. Temperature of source producing sound
4. Frequency of the sound

Q. Assertion – The speed of sound in hot region is greater than that in cold region.

Reason – As the temperature increases the molecules goes farther away from each other and thus disturbance is transmitted slowly.

1. A is false while R is true
2. A is true while R is false
3. Both A and R are true, but R is not the correct explanation of A
4. Both A and R are true, and R is the correct explanation of A

Q. We see lightning before thunder, as the speed of light is more than the speed of sound in air.

1. False
2. True

Q.

Why is the speed of sound the fastest in solids?