HELP! Electronic signals can travel very long distances in fibers, due to total internal reflection.

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these