What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.
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语言 英语 ● 格式 PDF ● ISBN 9780822504436 ● 出版者 Lerner Publishing Group ● 发布时间 2001 ● 下载 3 时 ● 货币 EUR ● ID 4754241 ● 复制保护 Adobe DRM
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