Given a scientific question, generate a correct answer to it.

[EX Q]: What phenomenon makes global winds blow northeast to southwest or the reverse in the northern hemisphere and northwest to southeast or the reverse in the southern hemisphere?
[EX A]: coriolis effect

[EX Q]: Renal plasma flow equals the blood flow per minute times the what?
[EX A]: hematocrit

[EX Q]: What can be used to mechanically separate the two elements by attracting the iron filings out of the mixture and leaving the sulfur behind?
[EX A]:
magnet