Physics Questions - Module #20
• Feel free to use the questions below to check (or improve) your understanding of the concepts in this physics module.

1. Compressions and rarefactions are not present with
1. longitudinal waves
2. transverse waves
3. both of these
4. neither of these
5. not enough information provided
6. none of the above
7. all of the above

2. All other things being equal, the speed of a sound wave ____ if its wavelength increases.
1. increases
2. decreases
3. both of these
4. neither of these
5. not enough information provided
6. none of the above
7. all of the above

3. A 680-hertz wave with a wavelength of 1/2 meter travels in air with a speed of
1. 680 m/s
2. 6800 m/s
3. 340 m/s
4. 3400 m/s
5. 1/2 m/s
6. 1 m/s

4. You hear a lot of static from your radio. Is the static you hear more likely to result from receiving FM or AM radio waves?
1. FM
2. AM
3. Neither produces any static.
4. Both produce equal amounts of static.
5. not enough information provided
6. none of the above
7. all of the above

5. You see lightning flash in the distance, and hear the thunder 10 seconds later. Assuming that sound travels at 340 m/s through the air, how far away was the lightning strike?
1. 34 meters
2. 3.4 meters
3. 340 meters
4. 3.4 km
5. 34 km
6. 340 km