An uncharged metal sphere is placed on an insulating puck on a frictionless table. While being held parallel to the table, a rod with a charge q is brought close to the sphere, but does not touch it. As the rod is brought in, the sphere
a. remains at rest.
b. moves toward the rod.
c. moves away from the rod.
d. moves perpendicular to the velocity vector of the rod.
e. moves upward off the puck.
b
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The three stars of the Summer Triangle are
A) Antares, Arcturus, and Spica. B) Arcturus, Vega, and Algol. C) Deneb, Spica, and Vega. D) Vega, Deneb, and Altair. E) Altair, Antares, and Arcturus.
Nearsightedness can usually be corrected with
A) converging lenses. B) diverging lenses. C) achromatic lenses. D) cylindrical lenses. E) spherical lenses.
The circuit below contains three 100-watt light bulbs. The emf ? = 110 V. Which light bulb(s) is(are) the brightest?
a.
A
b.
B
c.
C
d.
B and C
e.
All three are equally bright.
The Jovian planets can be eliminated as hosts for life because:
A) they do not have an atmosphere. B) they are too hot for liquid water to survive on the surface. C) they have water in the form of ice on the surface. D) they do not have solid surfaces.