The hypothesis is that the closer the blade is to 45 degrees, and the bigger the blade, the more electricity the windmill will produce.

You will build a windmill, attach blades of different sizes and angles, measure the current output, and take notes.

You will need electrical wires, a rubber band, a fan, a tape measure, a windmill, an ampmeter, a protractor, an electrical generator, and 8 blades of 5cm x 1cm, 10cm x 1cm, 15cm x 1cm, and 20cm x 1cm.

The results showed that the closer the angle of the blade to 75 degrees, the more electricity was produced for all blade sizes except 100 cm2. At 90 degrees, there was no current generated at any of the blade lengths. The hypothesis was rejected because the greatest amount of electricity was produced at the 75 degree blade angle.

This science project is interesting because it shows how the angle and size of the blades affects the efficiency of a windmill.

Variations to consider include testing different blade widths and testing different wind sources.

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!