An aurora can be found in the
a. exosphere
b. troposphere
c. mesosphere
d. thermosphere

Which statement best describes how private industry decides where to spend the money on research and development

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

A58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move toward third base with a velocity of 38.0 m/s.