Which of the following is not true about differences between novae and supernovae?
A) The same star can undergo novae explosions more than once, but can undergo only a single supernova.
B) Supernovae eject gas into space, but novae do not.
C) Novae occur only in binary star systems, while supernovae can occur both among single stars and among binary star systems.
D) Novae are much less luminous than supernovae.
B
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Three point charges are positioned on the x axis. If the charges and corresponding positions are +32 ?C at x = 0, +20 ?C at x = 40 cm, and ?60 ?C at x = 60 cm, what is the magnitude of the electrostatic force on the +32-?C charge?
a. 84 N b. 12 N c. 36 N d. 50 N e. 48 N
In the Copernican system, Earth moves slower along its orbit than the planets that lie farther from the Sun
a. True b. False Indicate whether the statement is true or false
One light-year (ly) is about _____
A) 23,000 AU B) 34,000 AU C) 56,000 AU D) 63,000 AU
_________corrosion is intense, localized corrosion that occurs when a material has areas of restricted exposure to an electrolyte.
Fill in the blank(s) with the appropriate word(s).