Question Consider a proton moving across an equator of the Earth towards 35° NE-direction, at a speed of 2500 km/s. If
magnetic field at a crossing point is towards 90° direction relative to equator, and has a magnitude of about
0.5 micro-Tesla, how much force would be exerted on a proton?​

where’s the list ? the question is incomplete

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.

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.