Electromagnetics

Today Meena and I made an electromagnet with wire, a nail, and a battery. First, we had to go and measure the magnetic stuff without any wire wrapped around the nail. Then we had to do it with it wrapped around 3 times, 6 times, 9 times, and so on and so forth. We had gotte to 9 winds and I accidentally deleted it ALL!!! Good thing it was the end of class anyways.
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Heat Sheilds

Today Rhys and I attempted to make a heat shield. We rolled up a ball of tin foil then put another layer on it and made it look like comet. It lasted for 50.63 seconds. Not too bad for a first try!!!

Impact Craters Lab

Today Alaina, Honore, and I all did the Impact Craters lab. We had to drop a golf ball from 5 differant heights (we did 6) and measure the depth and width. We found that 4.5 (for the width) and 2 (for the depth) centimeters was constant in all but the last two where 1 (for the depth) and 3.5 (for the width) centimeters was constant. Next, we had to calculate the GPE. The way we have to calculate the GPE is GPE=MGH we had the G and the H but we needed the M to be able to find the GPE. So, we took the golf ball to the scale and found that it weighed 45.8 grams. We know that mass is measured in kilograms so we needed to divide 45.8 by 1000. 45.8/100=.0458. Using this, we calculated the GPE of each of the heights. These were the calculations: from 36inch=.41J. 30inch=.34J. 24inch=.27J. 18inch=.21J 12inch=.12J 6inch=.07J. Next we had to calculate the velocity by using GPE=KE when KE=1/2(M) (V)2. For these calculations we got the velocity for: 36inch=.62m/s 30inch=.6m/s 24inch=.5m/s 18inch=.4m/s 12inch=.3m/s 6inch=.2m/s.
Thats all for today!

Motors: A Magnetic Movement

Today Meena, Thalia and I did a lab on conducting electricity. We had to make something using a 6-Volt battery, 5 feet of insulated copper wire, a straw, and a needle. First, we wrapped the wire around the straw until there was 3 inches covered. Then we scraped off the insulation on the ends of the wire. Next we touched the end of the wire to both sides of the battery. Then we inserted the pin into the wire covered straw. The first time that we did it, Thalia was holding the battery and wire and it sparked in her hand. It was so funny! She dropped the battery and ran... to the bathroom I think. Haha! Anyways, now its Meenas turn. She had been holding the battery for about 6 minutes when all of a sudden she screamed. Apparently, the wire gets really hot when you touch it. Thats all that we had time for today. Catch ya next time!

Body Power

Today Clara, Gabby and I found out how may calories a minute we burn. First, we needed to fin our BEE (Basal Energy Expenditure) which is found by this equation: BEE=65.5+9.M+1.7H-4.7A. A stands for age, H stands for height in centimeters, and M stands for mass (which is your weight in kilograms). Next we found how many calories we burned per minute. Then we found our EEE (Excersice Energy Expenditure) by multiplying the calories we burn per minute by the number of minutes in 2 hours (120). Finally, we found our DEE which is found by this equation: DEE=BEE+EEE. I found that my BEE is 807.8, my EEE is 240, and my DEE is 1047.8!!!

Gravity Alterations

I wasn't here for this. :)

Lego Robotix

I wasn't here for this. :)