Asked by Ella
A mountaineer estimates the depth of a crevasse by dropping a stone and listening for sound when the stone hits the bottom. The speed of sound in air is 340m/s. If the sound is heard 10s after the stone is dropped, what is the depth of the crevasse?
Do you find velocity first? i could not find any equation where i would only have one unknown for this question. please help?
Do you find velocity first? i could not find any equation where i would only have one unknown for this question. please help?
Answers
Answered by
bobpursley
break up the journey in going down, sound coming up.
Let tf be the time of fall. Then 10-tf is the time of the sound going up. In both cases, the distance is the same.
df=1/2 g tf^2
ds=vs*(10-tf)
Now, set ds=df, and solve for tf.
Once that is determined, you can find df.
Let tf be the time of fall. Then 10-tf is the time of the sound going up. In both cases, the distance is the same.
df=1/2 g tf^2
ds=vs*(10-tf)
Now, set ds=df, and solve for tf.
Once that is determined, you can find df.
Answered by
Simanga Gamedze
a stone is dropped into a well. The sound is heard 30s after the? stone is dropped. What is the depth of the well? Note that the speed of sound in air is 343m/s.
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