PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
The extension in a string, obeying Hooke's law, is x. The speed of sound in the stretched string is v. If the extension in the string is increased to 1.5x, what will the speed of sound be?
(1) 1.22v
(2) 0.61v
(3) 1.50v
(4) 0.75v