Two conductors made of the same material are connected across the same potential difference. Conductor A has three times the diameter and three times the length of conductor B. What is the ratio of the power delivered to A to the power delivered to B?

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