These devices are sometimes referred to as solar motors or thermal motors, or even thermal retraction motors. Sunlight hitting the strips is converted into thermal energy (heat) which then causes the rotor to turn without any electrical or other mechanical parts.
This inquiry activity investigates factors that make an object fall faster or slower and is an easy one for students to design, set up,and test.It does not require any special equipment and is a good way to use up and recycle used paper.
In the small village of Nashtifan, Iran, some of the oldest windmills in the world, with what may be the earliest windmill design in the world, still spin.
This machine sorts small candies (M&Ms and Skittles) by color. It was designed and built by Netherlands-based New Zealander Willem Pennings, who is studying Mechanical Engineering at Eindhoven Univers
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