Electrically neutral objects cannot exert an electrical force on each other, but they can exert a gravitational force on each other
A) True
B) False
B
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Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be
A) F. B) 2 F. C) F/2. D) F/4. E) none of the above
At what rate is thermal energy being generated in the 2R-resistor when ? = 12 V and R = 3.0 ??
A. 12 W B. 24 W C. 6.0 W D. 3.0 W E. 1.5 W
During his public school and university days, Einstein could best be described as
A) a child prodigy who attracted teachers' admiration. B) a nonconforming and daydreaming student. C) a good but not outstanding student. D) an excellent and hardworking student. E) a mediocre but hardworking student.
The distance to the Andromeda Galaxy is estimated at about 2 × 10^6 light years. A light year is the distance traveled by light in one year; if the speed of light is 3 × 10^8 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 × 10^7 s)
a. 10 × 10^15 m c. 2 × 10^22 m b. 1 × 10^18 m d. 6 × 10^12 m