A non-uniform meter stick is found to balance on a knife edge at the 60-cm mark. Where is the center of gravity of the meter stick?
a. at the 40-cm mark
b. at the 45-cm mark
c. at the 50-cm mark
d. at the 55-cm mark
e. at a position not given
e
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A. 105 J B. 130 J C. 780 J D. 520 J E. 340 J
How does the rotation of Venus' clouds compare to the rotation of its surface?
What will be an ideal response?
What is the Big Bang theory?
A) the idea that the universe as we see it formed when two massive galaxies collided together B) the idea that all matter and energy in the universe began in an unimaginably dense state, and then space itself began expanding C) the idea that the galaxy formed from the supernova explosion of a massive star
The critical angle for an air-glass interface is 42.6°. A light ray in air hits the interface, and the reflected ray is 100% polarized. What is the angle of refraction for that ray?
A) 47.4° B) 55.9° C) 24.3° D) 65.7° E) 34.1°