Give an example of a strain tensor for which there is (a) an increase in volume, (b) a decrease in volume, (c) shear strain but no volume change. (d) which if these strains could result from a P wave, and which result from an S wave

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

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.