A +5.0-µC point charge is 12 cm from a -5.0-µC point charge. What is the magnitude of the field they produce at the point on the line connecting them where their electric potential (relative to infinity) is zero?
(k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 0 N/C
B) 12.5 MN/C
C) 0.75 MN/C
D) 25 MN/C
E) 1.5 MN/C
D
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The neon atom tends not to gain any additional electrons because
A) its nuclear charge is not great enough. B) that would result in a positive ion. C) of the repulsions they would experience with electrons in the same shell. D) there is no more room available in its outermost occupied shell.
Like dark matter, dark energy will also retard the expansion of the universe
Indicate whether the statement is true or false
The principle of equivalence is primarily concerned with which of the following:
A plane flying horizontally at a speed of 50 m/s and at an elevation of 160 m drops a package, and 2.0 s later it drops a second package. How far apart will the two packages land on the ground if effects of air resistance are negligible?
A) 100 m B) 160 m C) 180 m D) 320 m