Objects moving at speed more than the speed of sound are called

An object is said to be moving with supersonic speed if it is moving withSelect an answerAa speed greater than the speed of sound.Ba speed less than the speed of sound.Ca speed greater than the speed of light.Da speed equal to the speed of sound.

As a train starts from rest and then accelerates down the track, coming toward me faster and faster, the speed of the sound waves coming toward me will be:Select one:a.some constant speed faster than the normal speed of sound in air.b.equal to the normal speed of sound in air.c.faster and faster.d.slower than the normal speed of sound in air.

in which medium does sound travel faster.

Which travels faster, light waves or sound waves?

Velocity of sound is maximum in which of followingSelect an answerAWaterBairCvacuumDSteel