Question

Describe an activity which shows that sound cannot travel in vacuum

Answer 1

First of all take a ring bell which is remote control and then pack it in glass jar. Make a hole over glass jar and take out all the air inside by mouth or by vaccum cleaner and place a cork on the hole for disturbance of air .

You will now observe that after we turn on the bell. Sound not reaches us but reaches in presence of air because it needs a medium to travel through..