Musical Notes and Frequencies of Sound

Hola everyone! Tis Nicole here.
Super sorry this blog is late, I had to way of getting to a computer last night and I never expected to be in the Guidance this morning for a whole hour.

Okay, so yesterday in class what we did first was correct the worksheet Sound Waves and the questions 10, 14, 16, and 20 in the sound booklet.

The answers for the booklet questions are as follows:
10. a) 529-524= 5Hz
10. b) T= 1/f = 1/5 = 0.2s

14. 440Hz - 5Hz = 435Hz
440Hz + 5Hz = 445Hz ---this is the frequency
436Hz + 9Hz = 445Hz ---this is the frequency
436Hz - 9Hz = 427Hz


Seeing as I am getting kicked off our schools computers because of a class, I'll finish this HOPEFULLY at lunch, or else once I get home (all depending if my brother left his laptop at home).


UPDATE
Okay, I'm finally here to finish the scribe.

16. wavelength = velocity/frequency = 331m/s / 261.6Hz = 1.27m
length = wavelength/4 = 1.27/4 = 0.316m

20. a) velocity = 331m/s + ((23'C)(0.6)) = 345m/s
b) 20m is full trip
10m/s is half the trip
d=vt=(345m/s)(1.0x10^-3s)=3.45m


Since I am in a major rush at the moment, I am just going to state the answers for the Sound Waves sheet:
1. 1218m
2. 8.77s
3. 1.19
4. 642m
5. 260m


We then read page 19, Musical Notes and Frequencies of Sound, where Ms K explained a triad, which is "a collection of three notes with frequencies in the ratio of 4:5:6", an example being the notes C, E, and G, which have frequencies of 256Hz, (5/4)(256)=320Hz, and (6/4)(256)=384Hz.

Ms K then demonstrated to us BoomWhackers, which are plastic tubes that when hit across your leg or something of that sort make a specific note, or produces a sound at a specific frequency.
We were given two sheets called "Singing Straws" where we made a an instrument that our of a straw by cutting holes into it and blowing through it.
The other sheet happened to be "Making A Straw Oboe" where we snipped one end of a straw so it looks like two reeds and we made a buzzing sound that depended on the length of the "reed" and how long the straw was.
There were questions to be answered in on these labs as well.

Oh, and a few people played Jingle Bells with the BoomWhackers. Whoever took the video should definitely upload it onto here.

The next scribe is Ryan, which should have been Melissa but I didn' realize that there was someone left who hadn't scribed yet so hopefully he picks her.
We'll see.