Heat Sheild

We made a heat shield. the mesh was like a flower shape with 2 strips of foil over the top. one strip dipped into the center and the other stayed flat across. the screw was connected to the center lowest part of the mesh. when we tested it it lasted for 5 minutes and 12 seconds. Then we turned off the torch because the particles from the melting foil were going into the air. The higher strip created a phisical berrier between the heat and the glue.

Motors

In our first experiment we demonstrated magnets and power by putting a coil of wire around a straw. We then striped the ends of the wire and held them to the opposing ends of a battery. Then we placed a straight pin in the straw, It was immediately sucked into the middle of the straw. The coil heated up and so did the needle. I think this is because of the electromagnetism between the wire pin and battery. The battery made the wire more magnetic. The second experiment we did was with the circle of wire magnet 2 Safety pins and magnet. when put together in te correct fashion it will make the circle spin and flip around.

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.

prep session #5

In this prep session I made my final robotix. I took several of the elements I thought worked particularly well from other peoples robots. I also incorporated saveral things that I found worked from my "reaserch". Unfortunently since almost everyone else had already built their robots and were done I felt bad about taking parts from them so I made do with what I could still find. If I had all the parts I needed I would have used the smaller cyndrilical peices to form the main part of the arm but there were barely enough of those for what I did use them for. I also wouldhave liked to have had more hand held controllers but that was ok. In the end i think I made a fairly good arm with what I had in the alloted time period fueled by my "reaserch".

prep session #4

Most of the versions of arms that I built this session didn't work because thy weren't stable enough. In this prep session I mostly focused on playing with adjusting the center of gravity. on several different occasions I was able to adjust the center of gravity enough that the arm wouldn't fall over compleatly but it was still too heavy to be picked up by two motors. I found that the part that made most of the difference was the grabber at the end, not because it was particularly heavy but because it stuck out too far. by the end of this class I had a beter adn more compleat Idea of how my arm should work.