The electric field shown is produced by a single point charge at the center of the picture

If a new negative point charge is placed at location B directly above the one pictured, the force on it will
a.
be zero.
b.
push it upward.
c.
push it downward.
d.
be in an unknown direction.
c
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We are able to define a mechanical equivalent for heat because
a. some thermal energy can be converted into mechanical energy. b. mechanical energy can be converted into thermal energy. c. work can be converted into thermal energy. d. some thermal energy can be converted into work. e. all of the above can occur.
At what speed, relative to the frame of the observer making the measurement, is the length of a meter stick 0.60 m?
A) 0.80c B) 0.60c C) 0.50c D) 0.70c E) 0.90c
Which of these Galilean satellites is most geologically active?
a. Io b. Europa c. Callisto d. Ganymede
A hunter points a rifle horizontally and holds it 3.30 m above the ground. The bullet leaves the barrel at 325 m/s and experiences no significant air resistance. The acceleration due to gravity at this location is 9.80 m/s2
(a) How long does it take for the bullet to strike the ground? (b) How far horizontally does it travel?