Aresearch-level van de graaff generator has a 2.15 m diameter metal sphere with a charge of 5.05 mc on it. what is the potential near its surface in mv? (assume the potential is equal to zero far away from the surface.)

The safe load, l, of a wooden beam of width w, height h, and length l, supported at both ends, varies directly as the product of the width and the square of the height, and inversely as the length. a wooden beam 4 inches wide, 9 inches high, and 240 inches long can hold a load of 6810 pounds. what load would a beam 3 inches wide, 8 inches high, and 144 inches long, of the same material, support? (round off your answer to the nearest integer.)