Sound

Sound
The echo of sound is more prominent if the surface is
soft
rigid
porous
smooth
Author: rikazzz Comment
Everyday Science
The loudest animal sound ever recorded is of
elephant
blue whale
shark
seal
Author: rikazzz Comment
Sound
To find the speed of sound, we use the relation
v = fλ
f = vλ
λ = fv
v = f + λ
Author: rikazzz Comment
Sound
Sounds of frequency higher than 20,000 Hz which are inaudible to normal human ear are called
noise
frequency
ultrasonic
amplitude
Author: rikazzz Comment
Sound
Ultrasonic waves are very useful for detecting
large objects
small objects
gases
none of above
Author: rikazzz Comment
Sound
The pitch of the sound depends upon
amplitude
loudness
area
frequency
Author: rikazzz Comment
Everyday Science
The speed of sound in the air was first accurately measured in
1718
1728
1738
1708
Author: rikazzz Comment
Sound
The sensation of sound persists in our brain for about
0.001s
0.2s
0.1s
10s
Author: rikazzz Comment
Sound
The intensity level of the rustling of leaves is
25 dB
0 dB
10 dB
100 dB
Author: rikazzz Comment
Sound
The characteristic of sound by which loud and faint sounds can be distinguished is known as
loudness
pitch
quality
intensity
Author: rikazzz Comment

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