Copernicus proposed that Earth moved around the Sun
a. True
b. False
Indicate whether the statement is true or false
False
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To keep chickens in a chicken coop warm, the kind of lamp to use is
A) fluorescent. B) CFL. C) incandescent. D) LED. E) all about the same
All known asteroids can be found in the asteroid belt
Indicate whether the statement is true or false
In a closed universe a beam of light will:
A) come back to where it originated. B) continue on forever. C) move on a circular path around its origin. D) reflect off the edge of the universe and come back. E) go on some strange path, never to return.
A long straight wire (diameter = 2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field 2.5 mm from the axis of the wire?
A. 3.2 mT B. 2.8 mT C. 2.4 mT D. 3.6 mT E. 3.0 mT