A planetary nebula
a. produces an absorption spectrum.
b. produces an emission spectrum.
c. is contracting to form planets.
d. is contracting to form a star.
e. is the result of carbon detonation in a 1 Mo star.
B
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What is the point where the Earth is furthest away from the Sun?
A. aphelion B. solstice C. perigee D. full moon. E. perihelion
The centers of granules
a. are hot material rising to the photosphere from below. b. are cool material falling from the photosphere to the regions below. c. are fainter and hotter than their surroundings. d. are brighter and cooler than their surroundings. e. show strong Zeeman effects.
A uniform electric field, with a magnitude of 500 V/m, is points in the +x direction. If the potential at is 2500 V, what is the potential at?
A) 0.50 kV B) 1.0 kV C) 2.0 kV D) 4.0 kV E) 5.0 kV
Although mass transfer can occur in binary stars, the small mass change does not impact the evolution of either companion
Indicate whether the statement is true or false