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Byju's Answer
Standard IX
Physics
Volume or Loudness
Give three ex...
Question
Give three examples for each of the following:
1) Good reflectors of sound
2) Bad reflectors of sound
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Solution
1) Good reflectors of sound: Metal floor, brick wall, cliff
2) Bad reflectors of sound: Thick curtain, carpet, blanket
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Q.
Give three examples for each of the following:
1) Good reflectors of sound
2) Bad reflectors of sound
Q.
(a) What is meant by 'reflection of sound'? What type of surfaces are the best for reflecting sound?
(b) Name any two objects which are good reflectors of sound.
(c) State the laws of reflection sound.
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A) A body of low thermal capacity gets heated or cooled quickly.
B) Good emitters are bad reflectors.
Q.
The minimum distance of reflector surface from the source for listening the echo of sound is :
Q.
A source of sound and a detector are placed at the same place on ground. At
t
=
0
, the source
S
is projected towards reflector with velocity
v
0
in vertical upward direction and reflector starts moving down with constant velocity
v
0
. At
t
=
0
, the vertical separation between the reflector and source is
H
(
>
v
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2
g
)
. The speed of sound in air is
v
(
>
>
v
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. Take
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t
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v
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g
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