Anegative point charge q is at the center of a hollow insulating spherical shell which has an inner radius r1 and an outer radius r2 there is a total charge of 3q spread uniformly throughout the volume of the insulating shell not just on its surface determine the electric field for the following use any variable or symbol stated above along with the following as necessary r and ε0

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j