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Levers /
by Oxlade, Chris.
Publication:
North Mankato, MN : Smart Apple Media, 2008
. 32 p. :
, Paperback | Includes index.
28 cm.
Date:2008
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Experiments with a ruler
by Royston, Angela
Publication:
, In this book about rulers you can: find out about forces, levers, friction, and air pressure; discover how quickly you react; make a catapult and much more!
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