关于比较北京和上海的英语作文
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/21 19:41:38
答案为D因为北京比上海的维度大,也就是北京的半径小于上海的,地球自转时两地的角速度是一样的,线速度为角速度乘于半径,所以线速度上海大于北京.
D再问:为什么再答:连接运动质点和圆心的半径在单位时间内转过的弧度叫做“角速度”。它是描述物体转动或一质点绕另一质点转动的快慢和转动方向的物理量。因为两地区相对静止,地球绕地轴转动所以角速度相同
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