1.

The blades of a helicopter rotate at an average rate of 500 rotations per minute. What is the frequency of rotation of blades

Answer»

the frequency is the NUMBER of times an event OCCURS in a CERTAIN time interval.

here it is 500times/min

or 8.33333times/sec

so 8.33 cycles/sec

which can ALSO be WRITTEN as 8.33Hz.



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