A pipe with the cross section shown in the figure above is filled with water and each end sealed with a movable piston. If piston 1 is pushed in with a force of 14.2 N then piston 2 pushes out with a force of 125 N.

What is the diameter of the pipe at piston 2? (to 3 s. f and in cm)

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.