scientists use an atom of helium and look at the # of rotations of the electrons around the nucleus. and they determine the second from that
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20 min in a medium pressure 100 watt bed is approximately equivalent to about 2 hours in the natural sun at noon. The suns heat changes depending on what time of day it is. So 1 minute in the tanning bed would be about 6 minutes in the natural sun at noon.
There are several, what is it that you want to calculate? The "natural" units for angular velocity are radians/second. The relationship between linear velocity and angular velocity is especially simple in this case: linear velocity (at the edge) = angular velocity x radius.
It is the total stopping time.
Ceremony enacted in the same way time after time ste of actions done in a specific way.
A truse is an agreement to give up at the same time. The incorrect spelling of truce - which is an agreement to give up at the same time.