1. CLICKER QUESTIONS

2. The person will hear a sound with a frequency 1.f > 1000 Hz 2.f < 1000 Hz 3.f = 1000 Hz 4.f changing continuously

3. Another person at large distance will hear 1.f > 1000 Hz 2.f < 1000 Hz 3.f = 1000 Hz 4.f changing continuously

4. Which of the following is true? 1. the wavefronts move faster at A than at B and C 2.the wavefronts move faster at C than at A and B 3.the frequency of the sound is highest at A 4.the frequency of the sound is highest at B 5.the frequency of the sound is highest at C

5. After the plane has passed, the observer reports hearing 1. a sonic boom, then silence 2. a succession of sonic booms 3. a continuous sonic boom, gradually dying away 4. first nothing, then a sonic boom, then the sound of engines 5. no sonic boom because the airplane flew faster than sound all along

6. Please make your selection... 1.Higher than normal 2.Lower than normal 3.Like a sonic boom

7. The traveling pulse carries 1.mass 2.energy 3.momentum 4.energy and momentum 5.mass and energy 6.all three 7.none of the three