At the instant depicted in the fi gure, the radar station at O measures the range rate of the space shuttle P to be r˙ = −12,272 ft /sec, with O considered fi xed. If it is known that the shuttle is in a circular orbit at an altitude h = 150 mi, determine the orbital speed of the shuttle from this information.

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.

the answer should be in the picture.