Alan Guth is best known for

a. discovering quasars.
b. discovering magnetic monopoles.
c. proposing magnetic monopoles as the explanation for the missing mass.
d. originating the inflationary universe.


d.
Guth proposed the inflationary universe in 1979.

Physics & Space Science

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The Local Group

A. is a supercluster. B. has the Milky Way as its center. C. contains about 30 member galaxies. D. is the small cluster to which the Milky Way belongs. E. None of these choices is correct.

Physics & Space Science

The prediction of special relativity that moving clocks run slow is

a. time dilation. b. length contraction. c. the equivalence of mass and energy. d. the principle of relativity. e. none of the above.

Physics & Space Science

Springs: An ideal spring has a spring constant (force constant) of 60 N/m. How much energy does it store when it is stretched by 1.0 cm?

A. 0.0030 J B. 0.30 J C. 60 J D. 600 J

Physics & Space Science

The SI unit of power is the ______________

Fill in the blank(s) with correct word

Physics & Space Science