A Cylindrical tube is filled with air. The air is pushed by a circular piston which has a surface with a 2-cm radius. What is the volume of the contained air if you know that the air fills the space of 18 cm distance?

this means that the temperature of both substances will be equal

i don't know that i agree with that but what's the question ?

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.