10 Knowledge Checks
Activity 2: Wave equation
Activity 2: Whale Song
This is an interactive video. Try it out!
Listen to a whale sings.
Answer questions during watching. Click on the hand icon when video stops and answer a question.
Recall that sound waves require medium to propagate. In water speed of sound is more that in air.
Activity 3: Resonance of Sound
Step 1: Read and watch the video
Resonance plays an important role in our life.
When we push a child on a swing we want an external force to have the same frequency as the natural frequency of the swing in order to increase the amplitude of the swing.
This is an example of a resonance.
Explores the nature of natural frequency and resonance, with applications in this video:
Hewitt-Drew-it! PHYSICS 85. Resonance of Sound
