Rubber rods charged by rubbing with cat fur repel each other. Glass rods charged by rubbing with silk repel each other. A rubber rod and a glass rod charged respectively as above attract each other. A possible explanation is that .

(A) All rubber rods always have an excess of positive charge on them.
(B) A rubber rod and a glass rod charged this way have opposite charges on them.
(C) Any two glass rods charged this way have opposite charges on them.
(D) Any two rubber rods charged this way have opposite charges on them.
(E) All glass rods always have an excess of negative charge on them.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.

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explanation:

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