Calculate the minimum distance at which a person should stand in front of a reflecting surface be able to hear an echo ( speed of sound in air = 340 m/s)
Answers
Answered by
8
Answer:
The human ear can hear two sounds distinctly only if there is a time interval of
10
1
seconds between them. Now, the speed of sound in air at 20
0
C is 340m/s, so the distance traveled in
10
1
seconds will be:
Distance = Speed X time
=340×
10
1
=34m
Thus, it is possible to hear the echo at the minimum distance of
2
34
=17m between the source of sound and reflecting surface.
Answered by
2
Answer:
17m
Explanation:
SPEED OF SOUND IN AIR AT 20C=340M/S
TIME TO BE TAKEN TO HEAR AN ECHO=1/10SEC
WE KNOW THAT D=S*T
340*1/10=34M
34/2=17M
HOPE IT HELPS YOU MARK AS BRAINLIEST（￣︶￣）↗
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