Usain Bolt's practice day 1 reports that he runs one time around the track - 400 meters - in 38 seconds. What is his displacement?
What is his average velocity?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

The air that we breath is made mostly of which gaseous molecule

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.