Question Library

A boy standing some distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms\(^{-1}\), how far is he from the cliff?

The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20º and 80ºC respectively is?

If a sound wave goes from a cold air region to a hot air region, its wavelength will?

If a source of solid is moving, a stationary listener will hear a sound of different frequency. This is called?

What factors determine the frequency of a note emitted by a vibrating string?

The sound of an electricity bell dies down slowly when air is slowly pumped out from a bottle because

During a thunderstorm, the sound is heard over a long time. this phenomenon is referred to as?

Metal cables are used as telephone wires because?

Musical instruments playing the same note can be distinguished from one another owing to the differences in their?

An observer heard the sound of thunder 5.8s after the lightning flash was seen. How far was he from the source? [Speed of sound in air = 330ms-1]

The fundamental property of a propagating wave which depends only on the source and not the medium of propagation is the?

Notes of the same frequency sounded on a guitar and trumpet may differ in I. loudness II. Pitch III. quality Which of the statements above is correct?

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz?