kh11000703

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Our Design Green paper beach style windmill Our Experiment The wind did turn it very well initially, but then made it fall apart as the wind was too strong for the design. Results Reading 1 Current [19.2 ] mA Average Current = [19.2 ] mA Windspeed at fan = [5.9 ] ms-1 Resistance = [100 ] Ohms Power = I * I * R (remember to convert mA to A) 0.036864 W So with a windspeed of [5.9 m/sec ] our turbine generates an average current of [19.2 ] mA delivering [ 36.864] (convert W to mW) mW per second so in 10 minutes it could generate [36.864 * 600 = 22118.4 ] mW. If playing music on an iPod classic consumes about 77mW per second, 10 minutes of turbine time (assuming 100% energy transfer efficiency) can power [ 22118.4 / 77 = 287 ] seconds of playback time, enough to listen to about [ 1.6 ] 3 minute songs. Thoughts REPLACE THIS WITH YOUR THOUGHTS: HOW COULD YOUR WINDMILL BE IMPROVED, HOW COULD THE EXPERIMENT BE IMPROVED, IS 100% EFFICIENCY ENERGY TRANSFER REALISTIC, WHAT WOULD YOU ASK AN EXPERT, HOW CAN TECHNOLOGY SUPPORT SCIENCE TEACHING AND LEARNING, ETC...