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Why Do Balls Bounce?
Rob Moore
出版The Rosen Publishing Group, Inc, 2010-01-15
主題Juvenile Nonfiction / Science & Nature / Physics
ISBN16153191079781615319107
URLhttp://books.google.com.hk/books?id=LwxhEAAAQBAJ&hl=&source=gbs_api
EBookSAMPLE
註釋What is gravity? Why don't skydivers fly off into space? Do heavy objects fall faster than light objects? Curious minds will delightedly find the answers to these and other questions about gravity in this colorful and fact-filled book.