Chem ISP

concentrated nitric acid, concentrated sulfuric acid, 40 deg Celcius
nitrobenzene
HBr and iron(III) bromide can be the reagent for an electrophilic substitution.

Physics Pre

0.5 cm s-1
83 cm
For a standing wave, all points oscillate in phase. (but i vaguely rmb getting 3/3 for this test) D:

Physics Post

The increase in potential energy is quadratic as the body moves further from X.
The frequency of oscillation
FREE MARK! (NOT THE FAT MARK) YAY!

Yee Fatt! xD
A crappy video a day makes your day.