All quarks have 1/3 the electric charge of an electron
Indicate whether the statement is true or false
F
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The proper interpretation of the Hubble law (which relates the redshift of a galaxy to its distance) is that as time goes on, galaxies are____
a. staying relatively still in space while the space between the galaxies contracts b. moving away from a common center in space that is neither expanding nor contracting c. staying relatively still in space while the space between the galaxies expands d. moving away from a common center while the space between the galaxies expands e. moving toward a common center in space that is neither expanding nor contracting
You observe an x-ray burster. Based on current understanding, you can also conclude that you are observing
A) a close binary system in which one member is a white dwarf. B) a close binary system in which one member is a neutron star. C) a close binary system in which one member is a black hole. D) a close binary system in which one member is a neutron star and the other is a black hole.
A block is placed in oscillation on a frictionless horizontal surface attached to a spring that requires 125 N for the block to be stretched 15 cm away from equilibrium. From this position it is released, and oscillates with a period of 0.25 s. What is the mass of the block?
A. 0.66 kg B. 4.1 kg C. 1.3 kg D. 5.3 kg
Geology's best tool for establishing absolute (numerical) geologic time is called ______________ dating
Fill in the blank(s) with correct word