Because of refraction, the Sun near sunset appears
A) higher in the sky.
B) lower in the sky.
C) farther away.
Answer: A
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A one-dimensional or line defect in a crystalline material is a(n) _____________.
Fill in the blank(s) with the appropriate word(s).
What is unusual about the magnetosphere of Uranus? a. It is extremely small for the size of the planet
b. It can only trap a limited number of radiation particles. c. It has a corkscrew shape. d. Its poles are reversed. e. It has a bullet shape.
Projectile Motion: For general projectile motion with no air resistance, the horizontal component of a projectile's velocity
A. remains zero. B. remains a non-zero constant. C. continuously increases. D. continuously decreases. E. first decreases and then increases.
Why can't any star, no matter how massive, fuse elements heavier than iron?
A) because the nucleons within iron have the least mass possible B) because elements heavier than iron have less average mass per nucleon C) It could happen, we just have not yet observed a star massive enough to do this. D) Actually, this occurs on a regular basis, which explains the great abundance of heavy elements. s on a regular basis, which explains the great abundance of heavy