Question

In which of the following media can sound travel through?(i) Glass of water(ii) Balloon full of air(iii) Iron bar(iv) Vacuum

Answer 1

sound can travel in all except vaccum

Answer 2

Sound can travel through all the three media (i) Glass of water(ii) Balloon full of air and (iii) Iron bar except Vacuum.

Explanation:

• Sound is a type of energy caused by vibrations. It occurs when an object vibrates which in turn causes movement in surrounding air molecules. These air molecules bump into the molecules close to them, causing those molecules to vibrate as well and it continues until the vibrations reach our eardrums.

• Sound requires a medium to travel because it is the vibrations caused by molecules which cause sound. If there are no molecules, no sound will be able to travel.

• A Glass of water has water molecules, balloon full of air has air molecules and iron bar contains iron molecules. But, in vacuum no molecules are there, hence, no sound will be able to propagate.

Hence, Sound can travel through all the three media except vacuum.