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有一半径为R的水平圆转台,可绕通过其中心的竖直固定光滑轴转动,转动惯量J,开始时转台以匀角速度ω0转动,此时有一质量为m的人站在转台中心,随后人沿半径向外跑去,当人到达离转轴为r处时,转台的角速度为( )。 A. <br/> <img src="https://stat
NOTE: A RIVER RUNS THROUGH IT: WHAT STATES ALONG THE MISSOURI RIVER CAN LEARN ABOUT WATER ALLOCATION FROM CONFLICT IN THE ACF RIVER BASINAlthough debates over the allocation of water in the ACF Basin...