→ steve1012:2 q/(6epslon 0 ) 07/16 10:23
→ steve1012:7 GMm/R^2 = m*T^2/(4pi^2 R) m可以消 M可得 07/16 10:24
→ steve1012:10... F=q(E+VcrossB)這題很基本喔 07/16 10:25
→ stanley12406:感謝 借問一下T是多少啊 07/16 23:50
推 j0958322080:週期=365又1/4天 07/17 00:08
→ stanley12406:感覺好像不是帶天 07/17 00:12
→ j0958322080:對阿，所以請換成mks制 07/17 00:17