Of the objects lister, the one that you do NOT see BECAUSE of REFLECTED light is:
a. A painting
b. The moon
c. The wall of your home
d. The sun
Ans: d. The sun
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What was the temperature of the Universe when the recombination took place that produced the cosmic background radiation we observe today?
a. about 2.7 K b. about 300 K c. about 3000 K d. about 3 million K e. about 3 billion K
Weight and g: If you stood on a planet having a mass four times that of Earth's mass, and a radius two times that of Earth's radius, you would weigh
A. the same as you do on Earth. B. two times more than you do on Earth. C. two times less than you do on Earth. D. four times more than you do on Earth.
(c) Two electrons with equal speeds, one moving east and one moving west, collide. After the collision, the electrons move north and south with smaller speeds than they had originally. Nothing else is emitted.
A. C B. F
What is the most important factor that determines the thickness, and therefore strength, of the lithosphere?
A) pressure B) viscosity C) composition D) internal temperature E) distance of planet from Sun