Your friend gets a flat tire while driving up a road with a 35.0degree slope. while changing the tire he lets go of the spare and it begins to roll down the hill. his sister has stopped her car 4.51 m down the slope (of course this is very late on a cloudy night so she is there with her lights on). if we model the tire as a cylindrical shell with mass m and radius r that rolls without slipping. how fast (m/s) is the tire moving when it hits the sister's car? if instead we model the tire as a solid cylinder, how fast (m/s) would it be moving when it hits the sister's car?

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

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.