Wave velocity is also defined as the ………….. with which ………….. is transferred from one place to another place by wave motion.

1. speed, energy
2. speed, compression
3. speed, rarefaction
4. velocity, pressure

For sound to travel through medium, it need not :

1. be rigid
2. be elastic
3. possess inertia
4. be frictionless

The speed of sound in air at 0°C is nearly :

1. 1450 m s^-1
2. 450 m s^-1
3. 5100 m s^-1
4. 330 m s^-1