科研之友
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摘要
<正>世界万物是不断运动的。在物质的一切属性中,运动是最基本的属性,其他属性都是运动的具体表现。能量是物质运动转换的量度,简称"能"。What is energy?Energy is the ability to do work.It is what makes matter move or change.Energy helps you walk across the street,throw a ball into the air, vacuum(用真空吸尘器清扫)your house, watch television and ride the bus to school. Some of the above are possible because
