Hewitt Physics: Vibrations and sound I

(at this point, you should be able to answer many of these without the need of the video)

1. What is a wiggle in time called: ___________________

2. What is a wiggle in space called: ___________________

3. What is the maximum displacement from the equilibrium point called: ____________________

4. What is the distance between two peaks called: _____________________

5. Write the symbol that represents this distance: _____________________

6. What is the number of cycles per second called: _____________________

7. What is the shortcut name (the unit) for cycles per second: ____________________

8. If there is one second for one complete cycle, how long is the time (period): ________________

9. What is the equation for frequency: ________________

10. If electricity goes back and forth 60 times every second, what is the frequency: ______________

a. What is the period: _________________

11. Write the equation for wave speed below (write it the full way through):

12. What does c represent (3 words): ___________________

13. What is the speed of light in km/s: _____________________

14. How fast are radio waves going from the towers: __________________

15. KCCN is 1400 on the AM radio. How long are the waves (the wavelengths) of the waves it sends

out in meters: ____________________

16. Do you think light waves will be longer or shorter (not answered in the video): ______________

CONTINUED ON THE NEXT PAGE

17. What type of wave (longitudinal or transverse) travels along the wave: ________________

18. What happens when two waves are completely out of phase: ___________________

19. When two waves are sent out with different frequency, it is known as ______________(starts

with an i).

20. The phenomenon of two waves pulsating in and out of phase is known as ______________

21. The laser discs (came before the dvd) works by informing the player of the recordings

_________________ (starts with A).

22. Where do discs spin the fastest: ________________________________ (toward the inside or

the outside).

23. Think of and describe a device that is better than a rubber windshield wiper below (work on this

until the end of the period):