How to give the spheres exactly equal but opposite charges?
a. Make sure spheres are not...
Physics, 16.04.2020 02:52, GabbyLandry
How to give the spheres exactly equal but opposite charges?
a. Make sure spheres are not in contact with each other. Rub the glass bring the rod without touching near one of the spheres. Do the same with a piece of silk and another sphere. Remove the glass rod and the piece of silk.
b. Put the two metal spheres in contact with each other. Then rub the glass rod on the silk to charge the rod positively (hence to charge piece of silk negatively). Bring the rod near, but not touching, one of the spheres. Separate the spheres and remove the rod
c. Put the two metal spheres in contact with each other. Then rub the glass rod on the silk to charge the rod negatively (hence to charge piece of silk positively). Bring the rod near, but not touching, one of the spheres. Separate the spheres and remove the rod
d. None of the above.
Answers: 2
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Ionic compounds can be readily dissolved in water because the high dielectric constant of water screens and decreases the force between the oppositely charged ions.
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When a charged balloon sticks to a wall, the downward gravitational force is balanced by an upward static friction force. the normal force is provided by the electrical attraction between the charged balloon and the equal but oppositely charged polarization induced in the wall's molecules. if the mass of a balloon is 1.2 g, its coefficient of static friction with the wall is 0.71, and the average distance between the opposite charges is 0.80 mm, what minimum amount of charge must be placed on the balloon in order for it to stick to the wall? express your answer to two significant figures and include appropriate units.
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