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Holding a door open : wedge vs. wheels and axles / by Mari Schuh.

By: Material type: TextTextSeries: First step nonfiction. Simple machines to the rescue.Publisher: Minneapolis, MN : Lerner Publications, [2016]Copyright date: ©2016Description: 24 pages : color illustrations ; 19 cmContent type:
  • text
Media type:
  • unmediated
Carrier type:
  • volume
ISBN:
  • 9781467783026 (pb : alk. paper)
  • 9781467783033 (eb pdf)
Subject(s): DDC classification:
  • 621.8 23
LOC classification:
  • TJ147 .S4185 2016
Summary: "Is it easier to lift toys with a wheel and axle or a wedge? Readers will learn about how simple machines work in this book for early readers" -- Provided by publisher.
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Includes index.

"Is it easier to lift toys with a wheel and axle or a wedge? Readers will learn about how simple machines work in this book for early readers" -- Provided by publisher.

5-8.

K to 3.

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