Compared to other spiral galaxies, the Milky Way is ____
a. comparable to the smallest and dimmest spirals known
b. smaller and dimmer than most spirals
c. very average in size and luminosity
d. larger and brighter than most spirals
e. comparable to the largest and brightest spirals known
d
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Force on a Wire: If a calculated quantity has units of 
, that quantity could be
A. an electric field. B. an electric potential. C. ?0. D. a magnetic field. E. a magnetic torque.
Two point charges of +2.0 ?C and -6.0 ?C are located on the x-axis at x = -1.0 cm and x = +2.0 cm respectively
Where should a third charge of +3.0-?C be placed on the +x-axis so that the potential at the origin is equal to zero? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) A) x = 4.0 cm B) x = 1.0 cm C) x = 2.0 cm D) x = 3.0 cm E) x = 5.0 cm
The sun's X-ray and ultraviolet light output is greater than what we would expect based on the photosphere's temperature
Indicate whether the statement is true or false
What form of interplanetary debris did mankind discover first? Why?
What will be an ideal response?