A stone is dropped into a well,44.1 metres deep.The sound of the splash is heard 3.13 seconds after the stone is dropped.Find the velocity of sound in air.
339.2 m/s
350 m/s
258.3 m/s
450 m/s
The bob of a pendulum moves from the mean position to an extreme position in 0.28 seconds.Then the time period of the pendulum is
2.24 seconds
1.12 seconds
0.84 seconds
3.84 seconds
In SONAR we use
ultrasonic waves
infrasonic waves
radio waves
audible sound waves
A man claps his hands near a mountain and hears the echo after 4 seconds.If the speed of sound under these conditions be 330 m/s,calculate the distance of the mountain from the man.
660 metres
600 metres
750 metres
570 metres
A sound wave has a frequency of 1000 Hz and a wave length of 34 cm.How long will it take to travel 1 km?
3.20 s
2.94 s
5.94 s
3.10 s
A longitudinal wave travels from east to west in air.In which direction do the particles of air move?
East to west
West to east
North to south
South to north
A boat at anchor is rocked by waves whose troughs are 150 m apart and whose velocity is 30 m/s.How often do the crests reach the boat ?
0.2 s
10 s
0.5 s
5 s
The velocity of sound in vacuum is
332 m/s
330 m/s
288 m/s
0
A simple pendulum has a metal bob which is negatively charged.If it is allowed to oscillate above a positively charged metallic plate then its time period will
increase
decrease
remain the same
become zero
A sitar player plucks the wire of a sitar.After a short time each part of the wire starts vibrating in a direction perpendicular to the wire.Is the propogation of this disturbance a longitudinal or a transverse wave?
Longitudinal
Transverse
Stationary
Both longitudinal and transvers
