Find expression for Doppler effect in case of a moving source when the observer is at rest and there is no wind.

Dudecue an expression for apparent frequency of sound,when the listener moves towards a stationary source.

Describe the effect on passenger when a moving bus suddenly changes its direction of motion.

In everyday life Doppler effect is observed readily in sound but rarely in light,why?

Deduce the expression for instantaneous power supplied to a capacitor when the capacitor is connected to an ac source.

What is escape velocity? Find an expression for the escape velocity of a body when projected from the surface of the earth. Show that the escape velocity form the earth's surface is about 11.2 km/sec.

When is a collision said to be a perfectly inelastic? A mass is moving with speed v collides inelastically with another identical mass at rest. After collision, the first mass moves with velocity frac(nu)(sqrt 3) in a direction perpendicular to the initial direction of motion. Find the speed of the second mass after collision.