A tennis ball is struck and departs from the racket horizontally with a speed of 29.7 m/s. The ball hits the court at a horizontal distance of 20.4 m from the racket. How far above the court is the tennis ball when it leaves the racket?

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

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.