If two waves pass through the same region of space, they continue to move independently of one another
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TRUE
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A tube of mercury with resistivity 9.84 × 10-7 ? ? m has a uniform electric field of 23 N/C inside the mercury. What is the current through the tube, if the radius of the tube is 0.495 mm?
A) 18 A B) 180 A C) 29 A D) 280 A
Two imaginary spherical surfaces of radius R and 2R respectively surround a positive point charge Q located at the center of the concentric spheres. When compared to the number of field lines N1 going through the sphere of radius R, the number of electric field lines N2 going through the sphere of radius 2R is
A.
.B.
.C.
D.
E.
A square is 1.0 m on a side. Point charges of +4.0 ?C are placed in two diagonally opposite corners
In the other two corners are placed charges of +3.0 ?C and -3.0 ?C. What is the potential (relative to infinity) at the midpoint of the square? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) 1.0 × 106 V B) infinite C) 1.0 × 105 V D) 0 V E) 1.0 × 104 V
Of all the terrestrial planets, Mercury's orbit is most eccentric and tilted most above the ecliptic
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