When training to increase physical fitness, adaptation occurs A. gradually and progressively
B. short and fast
C. long and short
D. quick and easy

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.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

At what time will the interfering waves have an amplitudeof zero?