September 17, 2008

Hello everybody! This is Lynel, and I am today's scribe. Today in class we corrected the the sheets we were given for homework last night. Here are the answers to the worksheets just in case any of you have missed them...

Wave Characteristics

1. a) 330/20000= 0.165m

    b) 330/20= 16.5m

2. λ= 2.9m

3. F= 9.2x10^5 Hz

4. V= (6m)(2Hz)

      = 12m/s

5. a) T= 8s

    b) F= 0.125 Hz 

    c) λ= 16 cm 

    d) V= 2 cm/s

Wave Problems #7-14

Most of these problems invlove drawing so i'll show you where they may be found in the blue booklet.

7. a-d) refer to page 7 in blue booklet

8. a-b) it can also be found on page 7

        c) frequency

d) amplitude

9. Standing waves aren't produced in swimming pools where there are many people present because standing waves require the same wave lengths, amplitude, and frequency.

10. refer to page 7 (G. Wave Interference and the Principle of Superposition)

11. F= 4Hz

      d= 0.3m

      λ= 2(0.3m)

= 6m

     V= Fλ

=(4Hz)(0.6m)

=2.4m/s

12. V= 350m/s

       F= 420Hz

       λ= V/F

 = 350/420

 = 0.83m

The node is 0.83/2 which equals 0.42

  14. a) 3 wavelengths

b) 21 cm

c) 10.5 cm

d) 21m/s

We were also given class time to do the Transparency Worksheet that was handed to us. On this worksheet we learned the properties of two waves, transverse wave and longitudinal waves (compressional). Remember to study for tomorrows test!! Hope everyone does well!!! Tomorrows scribe will be Ryan Rara=)