A stone is dropped into a deep canyon and is heard to strike the bottom 6.91 s after release. How deep is the canyon? The speed of sound waves in air is 343 m/s and the acceleration of gravity is 9.8 m/s 2 . Answer in units of m.

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.

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.

Which type of reaction is shown in this energy diagram ?