How is the gravitational force related to the distance between two objects? It is directly proportional to the square of the distance. It is inversely proportional to the square of the distance. It is directly proportional to the distance. It is inversely proportional to the distance.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

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.