You spin an 800-gram mass on a thin string of length 0.5 m around your head. If the tension in the string is greater than 12 N, the string will break. You start to string the mass around your head faster and faster: a) At what angle from the vertical will the string break?
b) At what velocity will the string break?

multiple

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.