Alight, inextensible cord passes over a light, frictionless pulley with a radius of 8.3 cm. it has a(n) 19 kg mass on the left and a(n) 3.1 kg mass on the right, both hanging freely initially their center of masses are a vertical distance 3.4 m apart. the acceleration of gravity is 9.8 m/s2 at what rate are the two masses accelerat- ing when they pass each other?

How does the space charge width change with forward and reverse bias? also, calculate the space charge width for a reverse bias of 4v on a silicon pn junction at t = 300k and doping concentrations of na = 5x1015cm-3 , nd = 5x 1016 cm-3 .

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

The slope of a velocity time graph over any interval of time gives the during that interval