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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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?
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The principle of equivalence is primarily concerned with which of the following: