A solar-mass star will evolve off the main sequence when
A) it loses all its neutrinos, so fusion must cease.
B) it completely runs out of hydrogen.
C) it builds up a core of inert helium.
D) it explodes as a violent nova.
E) it expels a planetary nebula to cool off and release radiation.
C
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General Questions: In order to get an object moving, you must push harder on it than it pushes back on you.
A. True B. False
What is the magnitude of the horizontal displacement of the rock?
a. 3.53 m b. 13.3 m c. 222 m d. 26.1 m
The pupil of a cat's eye narrows to a slit width of 0.5 mm in daylight. What is the angular resolution of the cat's eye in daylight (? = 500 nm)?
a. 0.01 rads b. 10?5 rads c. 10?3 rads d. 10?4 rads e. 0.1 rads
If you blow air between a pair of closely-spaced Ping-Pong balls suspended by strings, the balls will swing
A) toward each other. B) apart from each other. C) away from the airstream.