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Alternative energy

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Sale!
Radiometer
A fun, vivid way to demonstrate heat transfer! The wings in the radiometer are alternately dark and ...
~~$14.50~~ $12.95 Add to cart
Solar Cells, 1000-02 – Solar Cell, 0.5 V, 500 mA
These solar cells are used to power small motors and other devices which draw small amounts of curre...
$17.95 Add to cart

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