How Can I Experiment With...?: A Lever (How Can I Experiment With Simple Machines?)
Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.
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-70%How Can I Experiment With...?: A Lever (How Can I Experiment With Simple Machines?)—
$15.94
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Description
Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.
