A small styrofoam ball of mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What excess charge must be placed on the ball for it to remain suspended in the field?
A) -16.0 nC
B) -18.0 nC
C) -57.2 nC
D) -125 nC
E) -196 nC
E
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The peculiar system SS 433 I. is emitting beams of energy and matter. II. is producing a spectrum with both a red and a blue shift. III. probably contains an accretion disk. IV. is the result of a planetary nebula
a. I b. III c. II & III d. I, II, & III e. I, II, III, & IV
Describe one major accomplishment for each of the following people: Copernicus, Tycho Brahe, Kepler, and Galileo
What will be an ideal response?
Although very unlikely, if life exists on Venus today, it will most likely be found
A) at the center of the planet B) just beneath the surface C) on the surface D) floating high in the atmosphere
Kepler's third law relates the square of the planet's orbital period in years to the cube of its average distance from the Sun in astronomical units
Indicate whether the statement is true or false