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Sound
Sound waves are mechanical because
They require medium for propagation
They don’t require medium for propagation
They are longitudinal
They are transverse
Author:
rikazzz
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Everyday Science
As compared to men, the frequency of the voice of ladies and kids is
equal
higher
lower
negative
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Sound
Sound energy passing per second through a unit area held perpendicular is called
intensity
frequency
amplitude
quality
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Sound
A ship sends an ultrasound that returns from the seabed and is detected after 3.42 s. If the speed of the ultrasound through seawater is 1300 ms
-1
, then the distance of the seabed from the ship would be
3000 m
2600 m
2200 m
2800 m
Author:
rikazzz
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Sound
The time a sound wave having frequency 2 KHz and wavelength 35 cm requires to cover the distance of 1.5 Km is
2.1 s
10 s
20 s
8 s
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rikazzz
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Sound
The technique used to locate underwater depths or locating objects lying deep on the ocean floor is called
FIBER
SONEX
SONAR
VIBEX
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rikazzz
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Everyday Science
Human voice results from the vibration of
ears
heart
vocal chords
muscles
Author:
rikazzz
Comment
Everyday Science
The frequency range for ultrasound is
20,000 Hz above
less than 20,000 Hz
25,000 Hz
less than 20Hz
Author:
rikazzz
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Sound
The technique used to absorb noise by using soft and porous surfaces is called
acoustic protection
refraction
absorption
semi lunar protection
Author:
rikazzz
Comment
Everyday Science
The sounds which are pleasant to our ears are called
noise
musical sounds
frequency
amplitude
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rikazzz
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