Question

show an activity to prove that sound needs a medium to travel

Answer 1

If we take a glass tube and put inside it a ringing telephone and then cover the the lid tightly so as no air gets in or out, we will observe that we cannot not hear the wringing of the phone. This is because sound needs a medium to travel

Answer 2

#take 2 rods and attach to the table at a particular distance

#attach the clock between two rods

#you will hear a sou nd now take the rod just slightly above you will hear a fainter or no more sound at all