The electric field in the region defined by the y-z plane and the positive x axis is given by E = ax, where a is a constant. (There is no field for negative values of x.) As x increases in magnitude, relative to V = 0 at the origin, the electric potential in the region defined above is
a. a decreasing function proportional to ?|x2|.
b. a decreasing function proportional to ?|x|.
c. constant.
d. an increasing function proportional to +|x|.
e. an increasing function proportional to +|x2|.
a
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An object that appears to be smaller on the sky will tend to be
A: closer than one that appears larger. B: farther away than one that appears larger. C: there will be no trend.
A brass rod (E 5 110 GPa) with a cross-sectional area of 250 mm2 is loaded by forces P1 5 15 kN, P2 5 10 kN, and P3 5 8 kN. Segment lengths of the bar are a 5 2.0 m, b 5 0.75 m, and c 5 1.2 m. The change in length of the bar is approximately:
(A) 0.9 mm
(B) 1.6 mm
(C) 2.1 mm
(D) 3.4 mm
Which of the following has NOT yet been observed in space?
A) formaldehyde B) methyl alcohol C) DNA D) ammonia E) hydrogen cyanide
The idea of complementarity is evident in the
A) dual nature of light. B) notion of opposites being components of a whole. C) yin-yang symbol of Eastern cultures. D) all of the above E) none of the above