(达州专版)2019中考物理第五单元机械与功能量第18课时机械能能源复习课件.ppt

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第五单元 机械与功 能量,学生用书P73,第18课时 机械能 能源,动能,重力势能,弹性势能,质量,速度,越大,大,越大,机械能,转化,减小,转移,转化,总量,一次能源,二次能源,可再生能源,不可再生能源,常规能源,新能源,裂变,聚变,内能,电能,学生用书P74,D,A,B,动,内,C,风能,电能,【点悟】 可再生、不可再生能源只针对一次能源而言。,压缩,新能源,小于,B,A,甲,乙,丙,丁,学生用书P75,A,A,A,A,B,C,C,D,C,煤和石油,风能和太阳能,核裂变,核聚变,核聚变,转换法,不能,速度,错误,没有控制小球到达水平面时的速度相同,C,甲,

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