For microbes to survive the journey in a meteorite from another solar system body to the Earth they would have to survive the
A) impact that blasted the rock off of the surface of its home world
B) high energy particles and radiation in space
C) entry through our atmosphere
D) all of these
D
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Fermat's principle could be the principle of least distance for
A) reflection. B) refraction. C) both of these D) neither of these
What law of nature explains why electrons must arrange themselves in atoms with no more than two per energy level, thus making chemistry possible?
A) the exclusion principle B) the uncertainty principle C) the law of conservation of energy D) the law of conservation of angular momentum E) the electromagnetic force law
A capture by a target nucleus of uranium-235 is most apt to occur for which type of "bullet" particle?
a. low velocity alpha particle b. low velocity proton c. high velocity neutron d. low velocity neutron
The nucleus of an ordinary hydrogen atom consists of a(n) ______________
Fill in the blank(s) with correct word