According to the second law of thermodynamics, for any process that may occur within an isolated system, which answer applies?
A. entropy remains constant.
B. entropy increases.
C. entropy decreases.
D. depends on the rate of change of the process.
B. entropy increases.
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Which of the following electron orbital transitions is not allowed?
(a) 3p to 3s (b) 4d to 3p (c) 5d to 4s (d) 5p to 4d
If you are in the Moon's umbral shadow, then you will witness
A) nighttime. B) a total solar eclipse. C) a total lunar eclipse. D) a partial solar eclipse. E) some kind of lunar eclipse.
The biological damage caused by radioactive materials is due to
A) nuclear fusion occurring within biological cells. B) thermal energy created by radioactive decay within biological cells. C) nuclear fission occurring within biological cells. D) the fast-moving daughter nuclei [or residual nuclei] passing through biological cells. E) the fast-moving alpha, beta, and gamma particles passing through biological cells.
The field just outside the surface of a long conducting cylinder which has a 2.0-cm radius points radially outward and has a magnitude of 200 N/C. What is the charge density on the surface of the cylinder?
a. 2.7 nC/m2 b. 1.8 nC/m2 c. 3.5 nC/m2 d. 4.4 nC/m2 e. 0.90 nC/m2