How does the rate of hydrogen consumption of a main-sequence B star compare to the hydrogen consumption of the sun?
A) A B star consumes hydrogen at a rate about 107 to 108 times faster than the sun.
B) A B star consumes hydrogen at a rate about 103 to 104 times faster than the sun.
C) A B star consumes hydrogen at a rate about 6 to 10 times faster than the sun.
D) This cannot be answered using the HR diagram.
B
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An up quark has charge +2/3, a down quark has charge -1/3, and a strange quark has charge -1/3. The Lambda0 particle is formed by a combination of an up, a down, and a strange quark. What is its charge?
A. 0 B. 1 C. +2/3 D. -2/3 E. -1
When observing an object, such as a space ship that is moving very quickly relative to you, the length of objects on that object will appear to be:
A) longer than when they are at rest. B) the same length as when they are at rest. C) shorter than when they are at rest. D) narrower than when they are at rest. E) wider than when they are at rest.
Does a high-speed bullet's path bend more than a light beam bends as it passes near Earth?
A) Yes, because the bullet is heavier than the light beam. B) Yes, because the light beam has a greater acceleration that the bullet. C) Yes, because the bullet moves slower than the light beam. D) No, because all falling objects accelerate at the same rate. E) No, because of Einstein's equivalence principle.
A pencil partially submerged in a glass of water appears broken or offset because of
a. polarization. b. diffraction. c. interference. d. refraction.