A Measure of sound

We only had time to do the "Winding up" section of the Sound lab. We found that the more surface area of the nail the coils covered the lower the reading on the detector was. I have no Idea why this was. Maybe it was producing a of of negative energy (electrons?) and that is what was making the reading lower. I think the lowest result we got was about -1.7. I wonder why sometimes we were able to get a positive reading with the same number of coils? What did this exercise have to do with sound?

Body Power

today I did the body power lab. My resting heart rate was 72 bpm and my Maximum heart rate was 134 bpm. My working heart rate was 87 although i must admit that i wasn't working my hardest. according to my maximum heart rate i was using 12% of my maximum rate and I burned .72 calories. My exercise expenditure was 86.4 and my Daily exercise expenditure was 829.024. When ed did the horse power exercise i found that my power is 75.57516 Watts or .101 horse power.

CUrious Magnets

Today our lab was on magnets and how to make a gauss rifle. You tape very powerful magnets to a ruler about 2 1/2 inches appart. Then you place 2 meatal ball bearings after each magnet. You then place a ball at one end of the ruler. The bal is pulled towards the magnet and thenthe energy is transfered from the ball to each other ball and magnet untill it comes to the end where the last ball shoots off the end.