PRACTICE QUIZ 14A

Answer the following questions completely and clearly.

1. What is a mechanical wave? Give examples.

 

2. On what does the speed of a mechanical wave depend?

  

3. Give examples of electromagnetic waves. How fast do they travel? Who predicted their existence? Who proved they exist?

 

4. What can happen to the energy of a wave as it moves between two different media?

 

5. State the princple of superposition.

 

6. State the law of reflection.

  

7. What is a standing wave? How is one created?

 

 

8. What are antinodes and nodes? How are they created?

 

 

9. What is refraction?

 

10. What is diffraction? Between low and high wavelength waves, which will be diffracted least?

 

11. Draw a transverse wave. Label the amplitude, wavelength, crests, and troughs.

   

 

Solve the following. Show all work and circle your answer.

12. Radio station WBOS in Boston broadcasts at a frequency of 92.9 MHz. What is the wavelength of the radio waves emitted by WBOS?

 

  

13. A second harmonic (n=2) standing wave is produced on a 0.600 m long harp string. If the frequency of this standing wave is 1046.6 Hz, how fast are the vibrations traveling through the string?