Question 13 Marks
Describe an experiment to prove that sound can transmit (a) solids (b) liquids.
Answer
View full question & answer→(a) Solids : Tie a knot or match-stick at each end of the thread so that the thread does not slip out through the holes. This makes a toy -telephone . Now use the toy telephone as shown in figure and talk to your friend . You will be able to hear the sound of your friend.
(b) liquids : First, bring water to a deep bowl. then take two large metal coins. Then hold these two coins with both hands. (one coin per hand) Dip your hand into the water in the bowl containing the coin. Clap your hands as if moving through the water to make the coins collide. When coins collide, they make a clicking sound. This experiment proves that sound waves can travel through liquids.
(b) liquids : First, bring water to a deep bowl. then take two large metal coins. Then hold these two coins with both hands. (one coin per hand) Dip your hand into the water in the bowl containing the coin. Clap your hands as if moving through the water to make the coins collide. When coins collide, they make a clicking sound. This experiment proves that sound waves can travel through liquids.