simple stellar models consider a sphere of mass m and radius r. calculate the gravitational potential energy inside the sphere as a function of radius p(r), assuming (a) a density ρ const which is independent of the distance to the center (b) a density which increases towards the centre according to in both cases (a) and (b), write down the volume-averaged average internal pressure needed for hydrostatic pressure, and determine how the pressure within the spher e depends on the distance from the centre

the rearrangement of particles in a physical change. hope this

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.