Asked by Angela
A rock is dropped from a sea cliff 400m high.If the speed of sound is a constant 330 m/s, how long after the rock is dropped is the sound of the splash heard at the top of the cliff?
Answers
Answered by
bobpursley
break the total sound into two parts:
1) time for the rock to hit the surface.
h=ho-4.9t^2
t= sqrt(400/4.9) check that.
2) time for the sound to go 400m
t= 400/343
check that
add the two times.
1) time for the rock to hit the surface.
h=ho-4.9t^2
t= sqrt(400/4.9) check that.
2) time for the sound to go 400m
t= 400/343
check that
add the two times.
Answered by
Angela
^acceleration is 9.8 as well. and wheres 343 from ?
Answered by
Bobalobadingdong
Shut up
Answered by
Anonymous
i tihnk that's a typo
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