Moving electric charges will interact with
A) an electric field.
B) a magnetic field.
C) both of these
D) none of the above
Answer: C
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When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the denser water of the Dead Sea, the buoyant force that acts on you is
A) greater than your weight. B) less than your weight. C) equal to your weight.
A point charge (?5.0 ?C) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 ?C) is placed on the x axis at x = ?4.0 cm. What is the magnitude of the electric force on a third charge (+2.5 ?C) placed on the y axis at y = 3.0 cm?
a. 90 N b. 45 N c. 54 N d. 72 N e. 36 N
Another name applied to the grain size in a rock is
a. specific gravity. b. porosity. c. texture. d. streak.
What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4 × 10^6 m, mass = 6.0 × 10^24 kg) with a period of 5.0 h?
a. 88 N b. 55 N c. 36 N d. 98 N e. 18 N