Where would a brown dwarf be located on an H-R diagram?
A) below and to the right of the lowest part of the main sequence
B) above and to the left of the highest part of the main sequence
C) in the upper right corner of the H-R diagram
D) in the lower left corner of the H-R diagram
A) below and to the right of the lowest part of the main sequence
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The combination of two separated point charges of opposite sign but equal magnitude is called an electric:
a. magnapole. c. quadrapole. b. dipole. d. monopole.
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
Given that 
and 
, what is 
? ?
A.
B.
C.
D.
E.
How have astronomers determined the mass of the Milky Way's supermassive black hole?
What will be an ideal response?
The primordial nucleosynthesis was sped up by the abundance of ________ in the universe once the temperature dropped below a billion K
A) helium-3 B) hydrogen C) deuterium D) tritium E) helium