The tiny ripples in the background radiation COBE found are due to
A) bubble-like nature of space.
B) reddening by interstellar dust clouds in our galaxy.
C) a gravitational redshift caused by growing dark clumps.
D) variations in the speed of different wavelengths of light.
E) different velocities of the edge of the universe.
C
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A G2 I star is ____________________ in diameter and ____________________ luminous than the Sun
Fill in the blank(s) with correct word
Rotational Kinetic Energy: A solid uniform sphere of mass 120 kg and radius 1.7 m starts from rest and rolls without slipping down an inclined plane of vertical height 5.3 m. What is the angular speed of the sphere at the bottom of the inclined plane?
A. 5.1 rad/s B. 8.7 rad/s C. 9.7 rad/s D. 6.1 rad/s
Laboratory experiments conducted with particle accelerators confirm predictions made by the theory that unifies ________
A) the strong, weak, and electromagnetic forces into the GUT force B) the electromagnetic and weak forces into the electroweak force C) the unification of all four forces into a single "superforce" D) the strong and weak forces into the combined nuclear force
Craters on the Moon are believed to have been caused by
a. wind erosion. b. water erosion. c. the impact of meteorites. d. volcanic action.