卫星绕行星表面做匀速圆周运动,要估算行星的密度,需要测出的物

卫星绕行星表面做匀速圆周运动,要估算行星的密度,需要测出的物理量是(      

    A.卫星的轨道半径                        B 卫星的运行速度

    C 卫星的运行周期                      D    行星的半径

                                                                                                                                 

答案

C

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