Question

You have two strings of different linear densities tied together and stretched end-to-end between a pair of supports. What happens to the speed of a wave that passes from the more dense string to the less dense one? does the speed increase, decrease, or no change(not change at all)?

Answer 1

As the speed of the wave depends on the linear density as v ~ 1/√(linear density), it will increase passing from the more dense string to the less dense one.