Two 10¢ coins (dimes) carrying identical charges are lying 2.5 m apart on a table. If an electrostatic force of magnitude 2.0 N is exerted on each coin by the other coin,
how large is the charge on each coin? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 2.6 ?C
B) 26 ?C
C) 6.7 ?C
D) 5.2 ?C
E) 52 ?C
E
You might also like to view...
Which of the following statements about globular clusters is true?
A) Most stars in the cluster are yellow or reddish in color. B) There is an approximately equal number of all types of stars in the cluster. C) All stars in the cluster are approximately at the same stage in their evolution. D) All stars in the cluster have approximately the same mass. E) Most of the stars in the cluster are younger than 10 billion years.
A uniform solid sphere is rolling without slipping along a horizontal surface with a speed of 5.50 m/s when it starts up a ramp that makes an angle of 25.0° with the horizontal
What is the speed of the sphere after it has rolled 3.00 m up the ramp, measured along the surface of the ramp? A) 8.02 m/s B) 3.53 m/s C) 1.91 m/s D) 4.01 m/s E) 2.16 m/s
Latent Heats: Heat is added to a 3.0 kg piece of ice at a rate of 636.0 kW. How long will it take for the ice at 0.0°C to melt? For water LF = 334,000 J/kg and LV = 2.246 × 106 J/kg.
A. 1.6 s B. 640,000 s C. 0.0 s D. 1000 s
A common belief is that everything that happens is predetermined by the predetermined mechanical motions of atoms, much as a clock operates. A good argument against this position is
A) Newtonian physics, on which this idea is based, cannot be conclusively proven to be true. B) many great scientists, such as Democritus, Kepler, and Newton, dispute this belief. C) science is not really relevant to our lives anyway. D) All of the above are good answers. E) Actually, there isn't any good answer to this position.