Array ( [0] => Array ( [title] => L42A [link] => https://www.youtube.com/embed/zCCaluOQqm0 ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第42講|Lecture 8 Conservation Laws|8_2A Momentum 8_2_1 Newton’s Third Law in Electrodynamics