The speed V of a transverse wave is given by :

1. V = $\sqrt\dfrac{T}{m}$
2. V = $\sqrt\dfrac{γP}{d}$
3. V = $\sqrt {Tm}$
4. V = $\dfrac{1}{d} \sqrt {γP}$

Various types of mechanical waves are :

1. electromagnetic, longitudinal, transverse
2. electromagnetic, transverse
3. longitudinal, transverse
4. electromagnetic, transverse.

With the increase in temperature of a gas, the speed of sound:

1. decreases
2. increases
3. remains the same
4. cannot say

The condition for reflection of sound wave is :

1. surface must be smooth
2. surface must be polished
3. reflecting surface must be bigger than the wavelength of the sound wave
4. reflecting surface must be smaller than the wavelength of the sound wave