The formation process for supermassive black holes is linked with the formation of galactic ____
a. disks
b. clusters
c. central bulges
d. coronae
e. halos
c
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The wavelength of any particle with wave characteristics, such as electrons and neutrons, is given by the _________relationship that equates the wave and particle momentum.
Fill in the blank(s) with the appropriate word(s).
The radio source ________ is located in a place consistent with the center of our Galaxy
A) Cygnus X-1 B) 3C 273 C) 47 Tucanae D) M-8, the Lagoon Nebula E) Sgr A?
By what process does the Sun generate energy?
A) nuclear fusion B) chemical reactions C) nuclear fission D) gravitational contraction E) gradual expansion
The figure shows a cross section of three parallel wires each carrying a current of 24 A. The currents in wires B and C are out of the paper, while that in wire A is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 4.0-m length of wire A?
a.
15 mN
b.
77 mN
c.
59 mN
d.
12 mN
e.
32 mN