Active galaxies are believed to be the product of collisions and interactions because ____
a. they are always seen in contact with another galaxy
b. the transfer of matter would explain the black hole eruption
c. the collision of individual stars would explain the black hole eruption
d. central bulges are formed by collisions
e. supermassive black holes are necessary for galactic collisions
b
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Car A is traveling at 22.0 m/s and car B at 29.0 m/s. Car A is 300 m behind car B when the driver of car A accelerates his car with an acceleration of 2.40 m/s2. How long does it take car A to overtake car B?
A) 5.50 s B) 12.6 s C) 19.0 s D) 316 s E) Car A never overtakes car B.
The stars of highest photospheric temperature are those of spectral class ______________
Fill in the blank(s) with correct word
Applications to Astronomy: In terms of the mass M of our sun, what is the Chandrasekhar limit of stellar mass, below which a star will eventually collapse into a white dwarf?
A. 0.8 M B. 1.2 M C. 1.4 M D. 1.9 M
A meteorite that is discovered on or in the ground, but not seen to fall, is called a(n) _______________
Fill in the blank(s) with correct word