a rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.2 s later. If the speed of sound is 340 m/s, how high is the cliff?
The sound of the rock dropped to sea was heard 3.2 later after dropping it. The velocity of sound is 340m/s.
The distance sound travels during 3.2s is `340xx3.2 = 1088m` .
So the height of the cliff is the time that sound takes to travel during the 3.2s. So the answer is 1088m.