Extra Explaining Questions - WAVES

WAVES

1. Lucy is playing in her paddling pool. As she pushes a ball up and down in the water it makes a small wave as shown in a figure below.
   
   


1. Which way does the water move as waves move across the pool?


2. Describe the motion of the other balls in the pool


2. Explain why guitars have strings of varying thickness.


3. Explain why radio waves are similar to light waves but not sound waves?


4. Explain why a duck a duck rmains floating at the same place as a wave passes by the water in a lake?
   [Show answer]

   Water waves are transverse wave therefore a duck experiences only the vertical displacement and not horizontal displacement
5. Briefly explain one reason why the walls and floors of broadcasting studio and a theatre room are always covered with soft curtains and carpets.


6. Briefly explain why we can hear people talking in the near places even without seeing them.


7. Briefly explain why an electric bell ringing inside a closed bottle does not produce sound.


8. Explain the following phenomena as applied in physics field.
   1. A bat can fly in the dark during the night without hitting an obstacle.
   
   
   2. Why it is not advisable for soldiers to March across a bridge in rhythm.