Please tell me the number in the decimal form

问题描述:

Please tell me the number in the decimal form
If a fluid with density 1500 flows with a velocity field v=3yi−3xj−2zk,find the fluid flow rate outward through the sphere x2+y2+z2=4.flow rate

这个俺真真地不会,但可以给翻译一下:如果密度为1500 的液体速度域为:v=3yi−3xj−2zk,求该液体从球 x2+y2+z2=4流出 的 flow rate ,哇,流体力学?,好高深哦,要套公式的吧