Spheres of Charge: In the figure, a conducting sphere of radius r1 = 0.050 m is placed at the center of a spherical conducting shell of inner radius r2 = 0.100 m and outer radius r3 = 0.140 m. The inner sphere carries an excess charge of -4.0 nC. The outer spherical shell carries a net excess charge of 3.0 nC. Calculate the magnitude of the electric field at the following distances r from the center of the spheres. (k = 1/4??0 = 9.0 × 109 N ? m2/C2) (a) r = 0.075 m (in the air space between spheres),(b) r = 0.120 m (in the metal of the spherical shell), and(c) r = 0.200 m (outside the spherical shell).
What will be an ideal response?
(a) 6.4 × 103 N/C (b) 0 N/C (c) 2.2 × 102 N/C
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a. the Moon broke from a rapidly spinning Earth b. the Earth and its Moon formed from the same cloud of matter c. the Moon formed elsewhere in the solar nebula and was later captured by Earth. d. the Moon formed when a very massive planetesimal smashed into the young Earth.
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a. more b. fewer c. the same amount d. ionized
The quantity ________, where ? is the wave function, represents the probability per unit volume of finding an electron in that volume
a. ?1/2 b. ? c. ?3/2 d. ?2
Low levels of ionizing radiation
a. are dangerous to the human body b. can be tolerated by the human body c. are beneficial to the human body d. none of the above