一个JJ请教

ninaluan

. W=K/ R^2, when R=200, W=******, ask when R=5600, W=?
【确认】W= (50/7) ******
请问W怎么得到？我算不出这个数

terp

I met this one in the exam. Basically, use R=200 and W=****** (a number) to get K. And then use k and R=5600 to get W. Don't worry, it is just a simple one.