12. Embed the sticks with rectangular hard paper (4 each) in a cork by using glue gun
13. Stick a motor of the multi meter into center of the wind blade and place it in front of an air conditioner
14. Measure the amount of electricity the wind blade produces (2 times for each wind blade)Data Processing and presentation:<br /> Amount of Electricity (mill volt)ModelTrial 1Trial 2Trial 3Averageuncertainty(2x8) 16cm253505452± 2(3x9) 27cm255576057± 2.5(4x10) 40cm219201819± 1(5x11) 55cm261595960± 0.5(6x12) 72cm273797776± 3<br />Table1. The amount of electricity (mill volt) produced with 5 different sizes of wind blades. Model 5, the biggest wind blade, produces on average 26 mill volts which is the most electricity <br />Sample Calculation:<br />Sum of the number of all 3 trials / number of trials (53 + 50 + 54) / 3 = 52.3The average amount of electricity the wind blades of model 1 produced = 52 voltmeter <br />Subtract the lowest number from the highest number /2(54 - 50) / 2 = 2The uncertainty of the wind blade model 1 is ± 2<br />Multiplication of the number of length and width of the wind blade 2 x 8 = 16The area of wind blade model 1 is 16 cm2<br />Figure1.<br />Figure1. This graph shows good result because most of the points except 2 are on the same line. It shows the constant increase of the amount of electricity as the area of wind blades increased. The outlier was not included because it is obvious that it has a mistake.<br />Conclusion and Evaluation:<br />The results showed that the wind blades that has bigger size of blade produces more amount of electricity than the wind blades that has smaller size of blade. Thus, the results support the prediction that the bigger wind blades produce more amount of electricity than smaller wind blades. The reason for this is because the area of the big blade can catch more wind than small blade so it can turn faster because of catching more wind energy and this makes more electricity.<br />The main error is that since some of the blades were not embedded in the same angle as others, so some blades did not work well. The way to solve this problem is to make sure that all the blades are embedded in the same angle. Another error is, since the cork of model 3 has some big holes, the motor was not stuck into the cork. A possible solution to this problem would be to use the cork that has no big holes in it. Temperature of the room was also possible error because air conditioners depend on how long they are turned on and how hot outside is and also how many people in the room. This may cause some small errors because temperature each time maybe is not exactly the same. This error is difficult to correct so best solution is do as many tests as possible to get accurate data. <br />http://physics.about.com/od/glossary/g/energy.htm<br />http://physics.about.com/od/glossary/g/potentialenergy.htm<br />http://answers.yahoo.com/question/index?qid=20081111181645AAt54g6<br />http://physics.about.com/od/energyworkpower/f/KineticEnergy.htm<br />www.virtualsciencefair.org/2006/wong6j2/definitions.html<br />http://www.kidzone.ws/WATER/<br />http://en.wikipedia.org/wiki/Energy_flow<br />http://en.wikipedia.org/wiki/Renewable_energy<br />http://en.wikipedia.org/wiki/Conservation_of_energy<br />