Sound Test Answers

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Sound Test

Class wrote the test on Sound.
Jessica will be the scribe for Tuesday.

Significant Digits & Unit Conversion

Basic review of basic skills.
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SIGNIFICANT FIGURES

S = Significant
N = Not Significant

1.
A. S, 2
B. S, 1
C. N, 4
D. N, 4
E. S, 2
F. S, 3
G. S, 1
H. N, 4

2.
A. 2
B. 4
C. INFINITE
D. 2
E. 3
F. 3
G. 3
H. 7
I. 4
J. 3
K. 2
L. 3
M. 3
N. 2
O. 5
P. 1
Q. 3
R. 3
S. INFINITE
T. 4
U. 5
V. 3
W. 3
X. 3
Y. 1
Z. 4
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DETERMINING SIGNIFICANT FIGURES
1) 4
2) 3
3) 3
4) 6
5) 4
6) 6
7) 6
8) 1
9) 3
10) 7
11) a) 71.76 s b) 1896 kg
12) a) 1641.0 m b) 2.222 h
13) a) 0.13 m b) 58.0 cm
14) a) 33 m/s b) 58.0 cm
15) a) 5,3,2,3 b) 53.8 g c)3
16) a) your lab partner - there are two significant digits after the decimal in lab partner's measurement and you only have one significant digit in your measurement
b) 8.5 mL
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UNIT CONVERSION

Most commonly used units (please put a check beside these units on your sheet!):
mega, kilo, centi, milli, micro

1) 6 x 10^3
2) 4.9 x 10^-3
3) 7.6 x 10^2
4) 3.21 x 10^1

* Finish off #5-10 for next class.
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NEXT SCRIBE IS:

...Jessica!

SOUND TEST: MONDAY.

October something, 2007 i think

Okay I don't know if I'm doing this right or not but w/e lol
if i mess up then TOO BAD

uhhh
okay today like. we like..... played with straws =)
and watched like..... these videos...... and we had to like
write some points on each clip right.. so yeah...... and uhhh
i wrote down 8 points
and id write them but i forgot my binder at my workplace lol...

oh and uhh we did a lab on that oboe thingy yeah.....
and we had fun...... well at least i did.......
yeah i think thats it........ =)


oh and i think im sposed to pick a scrive for tomorow eh........ so i guess ill pick..... uh.....
that dude who said he injured his leg =) whats his face
kevin
yeah that dude

Tuesday, Oct.16

Hey, I'm Eric, and I'm today's scribe.

Today we read over pages 7 to 15 in the yellow sound booklet.
That took up most of the class, so we didn't do a lot.
We were also assigned questions 1, 2, 6, 11, 14, 17, 18, and 19 on page 27 of the yellow booklet.

That's all for today, nothing too exciting.
Tomorrow's scribe will be....ERIC--I mean SANGIIE

Standing Waves

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Working with the Speed of Sound

Hello, this is a new cycle for the scribes. Today in class we finished correcting the questions from last week. I will be showing the corrections later in the scribe. We also corrected the worksheet about the speed of sound that we received last week.
Okay here are the corrections for last week's work:

8a) Intensity is the energy transmitted past a given area per unit of time. It is also an objective measurement. Loudness depends on the amplitude of the wave and it is a subjective measurement.

b)Frequency is the number of vibrations per second and it is an objective measurement. While pitch is how high or low a sound is and it is a subjective measurement.

9. 20Hz to 20 000 Hz is the range of frequencies a human can hear and it is called the Audio Spectrum.

10a)529Hz - 524Hz = 5 Hz

b)t=1/f
...=1/5
...=0.2 seconds

Now here are the corrections for the worksheet about the Speed of Sound:





Okay those are all of the corrections we've done today in our Physics class. Homework for tomorrow is the worksheet that we received called Sound Waves. Our next scribe will be... ERICT. So until next time good luck in school and hope this helps. Bye Bye.

Speed of Sound Lab

Today the class performed a lab to determine the speed of sound in air. There was a worksheet with questions on the speed of sound that was handed out. This is due for Monday.
Scribe for Monday will be benofschool.

Vibrations and Sound Part 2 Video

Today , we watched the physic film .Mr "same same " (i dont know his name ^^) ..teached us about the sound.In the film,we saw when we knock one of 2 tuning forks which faced to each others, the one which was not knocked also vibrate because of the resonance,and the other things are the tuning fork vibrate and created air pressure ect.... and the end of the class,Ms. Kozoriz showed us the voice of the big woman which can broke a glass >.< ,and the answer of the Exercises:3-4-5-7, you can check them if you missed today 's class...
3/ Dog can hear frequencies in ultrasonic region,you can't
4/ a.Change amplitude
b. change frequency
5/Vibration of sound caused energy to trigger the avalanche
7/ A medium is needed



Next scribe is kissy

The Best Blog Ever!!

Ok so today we read the first couple pages in the yellow booklet. We learned that sound is a LONGITUDINAL wave. (Remember that!) Also, slightly different sounds produce a term a called "beats" when combined. Beat waves are the difference in the sounds. For example, if one sound is 440 hertz and another sound is 436hertz then the beat wave (difference) is 4 hertz. Yeah....that's all I can remember because it's like really late. Anyways we also got a worksheet that had questions like, if a man sets his clock to a factory's whistle that rings at noon and he is 3 km away, will his watch be BEHIND OR AHEAD? We also got homework in the yellow booklet. Questions 3,4,5,7,8,9 or something like that. Then we had a fire drill. Oh yeah and the most exciting part of the day was ms.K's pendulum (I think i spelled this wrong) experiment that totally worked! HAHA......ok enough sarcasm. Well I don't know anyone's name in the class, oh wait i pick Cow Milk to scribe for tomorrow...ok goodnight...i hope i make it to school tomorrow

Same Same Video

Hello, its me Kristina and I am the scribe for yesterday's class. We basically just watched a video of Vibrations and Sound and stuff with the "same same" guy. While we were watching, we were supposed to jot down 5 to 8 points on things that we learned or had learned prior to watching the video and then hand it in. After watching the video, Ms. Kozoriz gave us back our tests and went over the answers for us (check previous blog post).

That's pretty much it, as for the next scribe...I choose Sangiie.