This graph is made from measurements of the cosmic microwave background (dots) and a model based on the hypothesis of inflation. What does it show?
A) Measurements of the separation between regions of different temperature (in the cosmic microwave background) agree with predictions made by the hypothesis of inflation.
B) It shows that the temperature of the cosmic microwave background is about 3 Kelvin.
C) It shows that some regions of the early universe must have been hundreds of times as dense as others.
D) It shows that the universe has no center and no edges.
A) Measurements of the separation between regions of different temperature (in the cosmic microwave background) agree with predictions made by the hypothesis of inflation.
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Two balls, A and B, of mass m and 2m respectively, are carried to height h at constant velocity, but B rises twice as fast as A. The work the gravitational force does on B is
a. one quarter the work done on A. b. one half the work done on A. c. the same as the work done on A. d. twice the work done on A. e. four times the work done on A.
Ripples in the Cosmic Microwave Background correspond to
A) matter density fluctuations. B) temperature fluctuations. C) energy fluctuations. D) fluctuations in both matter and radiation. E) imperfections in measurement techniques or equipment.
Consider a sphere with a positive charge uniformly distributed on its surface. The sphere spins clockwise around the z axis. The magnetic field this sphere creates is
A. unidirectional. B. circular. C. radial. D. None of the above.
In the Copernican system, Earth moves _______________ along its orbit than the planets that lie farther from the Sun
Fill in the blank(s) with correct word