A25 {\rm pf} parallel-plate capacitor with an air gap between the plates is connected to a 100 {\rm v} battery. a teflon slab is then inserted between the plates, and completely fills the gap.
what is the change in the charge on the positive plate when the teflon is inserted? (change in q=? nc)

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

no sign of dia of fuel cell

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.