Wedges to the Rescue - Thales, Sharon
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From cutting apples to zipping a backpack, you need wedges. Read Wedges to the Rescue to learn what wedges are, how they work, and how these simple machines can save the day.

Wedges to the Rescue 2007, Capstone Press, Mankato, MN

ISBN-13: 9780736867504

Hardcover

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