A thin spherical copper shell of radius 9.5 cm carries an excess charge of -4.2 nC. How many excess electrons are on
(a) the outer surface of the shell, and (b) the inner surface? (e = 1.60 × 10-19 C)
(a) 2.60 × 1010 electrons (b) zero
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A proton has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. This magnetic field must have a component
A) upward. B) to the east. C) to the west. D) downward. E) to the north.
________ travel(s) the farthest from the Sun.
A. Charon B. Pluto C. Comets D. Asteroids
The larger the value of Hubble's constant, the more rapid the expansion of the universe and hence the younger the universe
Indicate whether the statement is true or false
A moving object's mass is twice its rest mass. Its length (in the direction of travel) must therefore be
A) one-half its proper length. B) twice its proper length. C) one-fourth its proper length. D) four times its proper length. E) times its proper length.