(January 17, 2017 at 4:03 pm)Alex K Wrote:(January 17, 2017 at 9:41 am)Cyrinistar Wrote: I abhor Math, especially parabolas.
Hehe, I just spent the last 3 months torturing my 11th graders with those
When I taught physics, I made 2 8-foot diameter parabolic reflectors (8 segments, just paper on a plywood frame, so not true paraboloids of revolution). I set a lit propane torch in the focus of one and let the students listen at the other. Worked pretty well. The kids didn't like the way their voices sounded, so I explained that the higher frequencies are heard better than the low ones due to the gain being dependent on the frequency. Also, the paper doesn't really reflect the signal that well at all frequencies.
If you get to thinking you’re a person of some influence, try ordering somebody else’s dog around.
