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
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
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.
Geology's best tool for establishing absolute (numerical) geologic time is called ______________ dating
Fill in the blank(s) with correct word