The quantum of the gravitational force is the
A)
muon.
B)
graviton.
C)
pion.
D)
quark.
E)
newton.
B
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Which method does the Kepler space telescope use to detect extrasolar planets?
a. Doppler method b. microlensing method c. wobble method d. transit method e. astrometric method
Water is flowing through a pipe with a constriction. The diameter of the narrow section is one-third the diameter of the wide section. If the velocity of the incompressible fluid is 3.6 m/s in the narrow section, then what is the velocity of the fluid in the wide section?
A. 2.00 m/s B. 0.80 m/s C. 1.4 m/s D. 1.0 m/s E. 0.40 m/s
Evidence that the Earth was nearly molten at one time comes from the differentiation of materials by ________ from core to crust
Fill in the blank(s) with correct word
The text states that luminous matter in the Milky Way seems to be much like the tip of an iceberg. This refers to the idea that
A) luminous matter emits white light, much like the light reflected from icebergs. B) black holes are much more interesting than ordinary stars that give off light. C) dark matter represents much more mass and extends much further from the galactic center than the visible stars of the Milky Way. D) the luminous matter of the Milky Way is essentially floating on the surface of a great sea of dark matter.