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How fast does a spot of laser sweep across clouds of a turntable at the top of a mountain and turns 10 revolutions per second if it reaches clouds 10km away?
In km/ seconds:
10km=r= radius
Circumference = 2(Pi)(r) = 20km(Pi) = 62.83185307
The laser is making 10 sweeps/ second so times the answer by ten.
200(Pi) km/sec
or
628.3185307 km/sec
*If you have to go by sig. figs. 600 km/sec. If you don;t know what sig. figs. are ignore this.
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