A bystander hears a siren vary in frequency from 592 Hz to 396 Hz as a fire truck approaches, passes by, and moves away on a straight street. What is the speed of the truck?

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

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .