Swara places a ticking waterproof watch inside a sealed plastic bag and submerges it in a bucket full of…
Swara places a ticking waterproof watch inside a sealed plastic bag and submerges it in a bucket full of water. When she presses her ear against the outer wall of the bucket, she hears the ticking sound clearly. What does this experiment demonstrate?
Sound travels faster in air than in liquids
Sound can propagate through liquids as well as solids
Sound cannot travel through plastic
Water stops sound waves from spreading
Solution
The sound travels from the watch through the plastic bag, then through the liquid water, and finally through the solid bucket wall to her ear, proving sound travels through both liquids and solids.