Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in
Amplitude
Pitch
Wavelength
Speed of sound in air
A wire of uniform cross-section and length of 7 m is fixed between two rigid points. If a stationary wave is set in it and made to vibrate with one loop, the wave length of vibration will be:
28 m
3.5 m
14 m
7 m
A source of wave produces 40 crests and 40 troughs in 0.4second.Find the frequency of the wave.
400Hz
200 Hz
150Hz
100Hz
The sound waves in air are
Seismic waves
Partially longitudinal and partially transverse
Transverse waves
Longitudinal waves
A baby cries with a frequency 712 Hz, if the speed of sound in air is 356m/s, the wavelength of sound is:
.05m
5 m
0.005 m
0.5 m
A transverse wave has a speed of 5040m/s,its frequency is 315 Hz,then the distance between a crest and immediate trough is
80m
0.8m
8m
800m
Which of the following quantities is transferred during wave propagation?
Speed
Particles
Mass
Energy
Arrange in increasing order - Speed of sound in steel, in distilled water, in sea water and in oxygen.
Steel < distilled water = sea water < oxygen.
Oxygen < distilled water = sea water < steel.
Steel > distilled water > sea water > oxygen.
Oxygen < distilled water < sea water < steel
A bell vibrates 600 times within 3/2 seconds, its frequency and time period will be:
900 Hz, 0.0011 s
900 Hz; 1.1 s
400 Hz; 0.25s
400 Hz; 0.0025s
A swing has a time period of 1.4 seconds. The no. of oscillations made by it within 1 minute 24 seconds will be:
60
20
80
40
