A stone with a mass of 0.724 kg is dropped from the edge of a cliff. When the stone strikes the ground, the internal energy of the stone and ground increase by 2,307 J. If the stone is initially at rest when it is dropped, how high above the ground is the cliff? (g = 10 m/s2)

The correct option is this: the sound waves from the two trombones have slightly different frequencies.from the question given above, we are told that the loudness of the sounds were increasing and decreasing, this is because the frequencies of the two sounds are different. the means that the number of waves that pass a fixed point in a given amount of time differ for both sounds.

Hiya!   the answer is areagood-luck!       ʕ•ᴥ•ʔ   

From movment law u have this case where: distance d is : d = v*t; v =  velocity; t = time; from here u can extract the time.