Charge of a uniform density (8.0 nC/m2) is distributed over the entire xy plane. A charge of uniform density (5.0 nC/m2) is distributed over the parallel plane defined by z = 2.0 m. Determine the magnitude of the electric field for any point with z = 1.0 m
a. 0.45 kN/C
b. 0.17 kN/C
c. 0.28 kN/C
d. 0.73 kN/C
e. 0.62 kN/C
b
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A metal sphere of radius 10 cm carries a charge of +2.0 ?C uniformly distributed over its surface. What is the magnitude of the electric field due to this sphere at a point 5.0 cm outside the sphere's surface? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) 4.0 × 105 N/C B) 8.0 × 105 N/C C) 4.2 × 106 N/C D) 4.0 × 107 N/C E) 8.0 × 107 N/C
A small but dense 2.0-kg stone is attached to one end of a very light rod that is 1.2 m long. The other end of the rod is attached to a frictionless pivot. The rod is raised until it is vertical, with the stone above the pivot
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Which of the following is not a piece of evidence supporting the idea that Europa may have a subsurface ocean?
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A person is dragging a packing crate of mass 100 kg across a rough horizontal floor where the coefficient of kinetic friction is 0.400. He exerts a force F sufficient to accelerate the crate forward
At what angle above horizontal should his pulling force be directed in order to achieve the maximum acceleration? A) 21.8° B) 27.7° C) 30° D) 34.5° E) 45°