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Tuesday, November 30, 2010

Problem- Will the dominoes be able to create enough gravity to knock the other dominoes over after being hit by a pulley.
Hypothesis- I think that it will work all three trials because the pulley definitely has enough gravity to knock them over but it might miss them like once or twice
Materials-
A pulley
A 14 inch string
15 dominoes
Procedure-
1. Gather materials
2. Get a pulley and 15 dominoes
3. Get a 14 inch string to put under the pulley
4. Put the string on something sturdy so that it doesn’t tip inward
5. Take 6 trials for every team member
6. Then put the pulley at the top of the string
7. Let the pulley go down the string and observe
8. Do steps 1-7 six times per group member
9. Create a graph
10. Conclude
11. Clean up materials
Conclusion- I was right it did work almost every time the only time that it didn’t work was the forth trial and it was because the pulley didn’t make it all the way down the string. For 3 and 6 there was a little luck though because the pulley hit the first domino and then it kind of wobbled back and forth and then fell over.

Tuesday, November 23, 2010

Problem- Will if a ball hits another ball will they both go down a PVC pipe.

Materials- PVC pipe, two marbles, a domino, and a flat surface

Hypothesis- I think that they will both go down the tube because the force of the first marble will make the other marble go down the pipe and the so will the other one.

Procedure-
1. gather materials
2. get marble A
3. get marble B
4. put PVC pipe at a 45 degree angle
5. put the domino behind marble A
6. set marble B in front of the PVC pipe
7. hit the domino over and have the marble hit the other one and go down the PVC pipe
8. observe
9. repeat steps 1-8 at least three times and list yes if both balls went down the tube and noif they didn't
10. create graph
11. conclude

Monday, November 15, 2010

lab #1

problem- will the weight of two different balls effect the speed when it rolls down a PVC pipe

materials- ping pong ball, marble, masking tape, PVC pipe, protractor

hypothesis- i think that the ping pong ball with go faster because it is lighter that the marble and the marble takes longer to get going

procedure-
1. gather materials
2. tape the PVC pipe to the protractor
3. get the ping pong ball and set it at the top of the PVC pipe
4. now get the timer so you will be able to see how fast it comes out of the PVC pipe
5. count down from 3 and then right before you let the ping pong ball go say Go
6. when you say go time the ball and see how long it takes to get out
7. do that 3 times for each group member
8. repeat steps 3-7 with the marble
9. record observations
10. graph
11. clean up

experiment- which ball will roll down the PVC pipe faster

5 proficiencies

proficiency #1- Demonstrate and explain how Newton's laws of motion to the physical world

proficiency #2- Demonstrate and explain how friction and gravity apply to Newton's laws of motion.

proficiency #3- Demonstrate and explain the relationship between speed and acceleration

proficiency #4- Demonstrate how simple machines utilize mechanical advantage to transfer energy

proficiency #5- Effectively explain how alternate forms of energy can be utilized to influence the United States energy needs.

Saturday, November 6, 2010

Oceans cover more than 70 percent of Earth's surface, so clearly they represent an enormous energy resource. In these past 10 years or so companies have been interested in the nonrenewable resources such as natural gasses, coal, and oil. Fortunately for our world, ocean power has become more attractive. now in the near term that will only contribute to the world by maybe a little sliver, but in the long term that could definitely turn into a sizable wedge.

Part of the reason everyone likes ocean power now is because it is a never ending resource. We can be reasonably assured that it will remain in motion far into the future.Not only that, ocean power is, for the most part, predictable. the tide charts in 2010 show the high and low tides as much as every minute, while maps show both the dimensions and speed of Earth's major currents.

Another key concept of ocean power is its density. The air's density is about 1.25 kilograms every cubic meter, and the density of seawater is about three times that much, which means it can transmit more energy to turbines placed in the ocean. Currents running no faster than 5 miles per hour can turn a tidal turbine more than 30 rotations in a minute, which delivers a better output than a wind turbine of larger size operating in strong winds.

In the end ocean power is much better that all the other nonrenewable fossil fuels. there are many reasons why, one is because they are killing the earth and it is also killing the o-zone layer and that will give us a higher percentage of getting skin cancer. The other reason is because it is strong and it can help out a ton of different things better than the fossil fuels could.