Andre heated several solid crystals of a substance called iodine, and the iodine changed directly to a gas. the iodine gas then cooled and changed into droplets. which two processes did the iodine undergo? a. condensation, then vaporization b. sublimation, then condensation c. deposition, then sublimation d. vaporization, then deposition

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