posted 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?
break the total sound into two parts:
1) time for the rock to hit the surface.
t= sqrt(400/4.9) check that.
2) time for the sound to go 400m
add the two times.
^acceleration is 9.8 as well. and wheres 343 from ?
i tihnk that's a typo