September 16, 2008

hey guys...i guess its finally the time for the hero to emerge in this blog to write the post...anyways, this is what we did in class:



First, class started a little late due to a lock down...i have an idea of what happened, but I'm not sure if it's true or if I'm allowed to say what i think happened on this post. Once class started, we corrected questions 7-14 in the blue booklet, which were assigned...at an earlier time...There was a lot of drawing involved, so if you want to check your answers, you should go check with a fellow classmate in order to ensure success in the test tomorrow, because I'm not so good at paint. We also handed in the 25-3 sheet (the sheet where we needed to draw constructive and destructive interferences between 2 waves and the ultimate wave on the back). We also went over the wave characteristics worksheet that i believe was assigned yesterday. Seeing as there are no drawings involved, i shall post the answers.



1) a) 0.0165 m b) 16.5 m

2) 2.9 m

3) 922000 Hz

4) 12 m/s

5) a) 8 s b) 0.125 Hz c) 16 cm d) 2 cm/s



If you're having problems with the...problems i suggest you go ask a friend for help before the test tomorrow.



Nearing the end of class, we were given another worksheet. This worksheet was titled: 18 transparency worksheet - wave properties. In this worksheet, we basically learned the properties of transverse and longitudinal waves as well as compare the two with each other. I was zoning out while we were correcting the answers, but i think i was able to get some correct. I believe the answers go as follows:



1) transverse and longitudinal/compressional waves

2) longitudinal/compressional waves

3) transverse wave

4) they are displaced parallel to the direction

5) transverse wave

6) compression can be compare to a crest, and rarefaction can be compared to a trough

7) transverse - crest to crest / trough to trough

longitudinal - compression to compression / rarefaction to rarefaction

8) the wavelengths are equal

9) the size of the compression or rarefaction

10) longitudinal/compressional wave



If some of the answers i posted up were wrong, then i apologize.



Finally, at the end of class, we did a little review of what will supposedly be on the test. I'm not sure if i caught everything, but some of the things i heard include waves (duh), movement of waves through different mediums, partial reflection/transmission, nodes (parts of a wave that doesn't move), and anti nodes (the high and low points of a wave). Just in case, though, i suggest you study everything we learned up until now for the test tomorrow.



This concludes my summary of the class for today, if you have any questions please do no hesitate to ask the teacher as well as some of my friends (including Karen, PJ, Mary, Pacifico, and maybe even Roger). You might as well ask everyone in our class. Well, that's all for now.



Bye Folks!

BTW the next scribe will be Niwatori-san!