slinky - part two

Today we worked through some of the math problems and talked about the homework.
Some students had me examine their paper, then they'll finish it at home and turn it in tomorrow.
We started another slinky lab today. We'll finish it on Tuesday.
The purpose of the lab is to examine more of the relationships and behavior of waves.
First, vel = freq x wavelength
Second, the effect of the material on the wave speed, freq, wavelength
Third, the pattern of a "standing wave", when a wave travels down the spring, bounces off the end, comes back, and collides with the waves that are traveling down the spring. The standing wave pattern has "nodes" and "anti-nodes" . A full wavelength, includes two "humps".

Take a look at this tutorial stuff, if you would like more words, etc.
http://www.glenbrook.k12.il.us/GBSSCI/PHYS/CLASS/waves/u10l4c.html

here's another site with good graphics, but it gets a little more complicated than what we're doing: http://hyperphysics.phy-astr.gsu.edu/hbase/waves/standw.html

no new homework today, but some people are finishing their previous one. We'll finish the lab tomorrow, and maybe get one more assignment (with time in class to work).