Modern scientific theories are NOT:
A) testable.
B) continuously tested.
C) simple.
D) perfect.
E) elegant.
D
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In a metal specimen subjected to a constant electric field, the drift velocity of the free electrons is:
(a) The same for all free electrons. (b) A linearly increasing function of time for all free electrons. (c) Dependent upon the electron quantum numbers. (d) Dependent upon the electron energy.
Assuming that xenon (atomic number 54) and krypton (atomic number 36) have the same temperature and pressure, in which gaseous medium does sound travel faster?
A) Xenon B) Krypton C) a mixture of both D) the same in both
Sedimentary layer A lies above sedimentary layer B. Fault C cuts through B but does not affect A. Arrange A, B, and C in order of oldest first to youngest last
Air expands adiabatically (no heat in, no heat out) from T = 300 K and P = 100 atm to a final pressure of 1 atm. Treat the gas as ideal with ? = 1.4, and determine the final temperature. Compare your result to the boiling points of nitrogen (77.4 K) and oxygen (90.2 K). Could this method result in the liquification of air?