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"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!"--Back cover. Suggested level: primary.
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1 edition- Other · English · 2011Franklin Watts · 30 pages · 9781445101637
ScienceJuvenile literatureExperimentsMeasuring instrumentsMiscellaneaRulers (Instruments)Physics