Parallel axis theorem and k ? nig theorem are deduced from the two laws of rotation 摘要由两个转动定律导出了平行轴定理和柯尼希定理。
4.
The expression of magnetic moment of an electrified body is similar to that of moment of inertia of a body with various density 摘要带电体定轴转动的磁矩计算与刚体定轴转动的转动惯量相仿,平行轴定理有助于磁矩计算。