If you toss a coin straight upward in train that slows while the coin is in the air, the coin will land
A) as if you were at rest.
B) in front of you.
C) in back of you.
Answer: B
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In the above H-R diagram sketch, which star is a white dwarf?
A. A B. B C. C D. D E. E
Light from a helium-neon laser (? = 632.8 nm) is incident upon a 0.200-mm-wide slit. Find the total width of the central maximum 2.00 m from the slit.
What will be an ideal response?
What is not true of Population I stars?
A. They are found in the disk. B. They are frequently blue. C. They are old. D. They are high heavy element content.
If a metal sheet containing a tiny hole is heated (without damaging it) and therefore expands, what happens to the angular location of the first-order diffraction maximum?
A) It moves toward the centerline. B) It moves away from the centerline. C) It doesn't change.