Answers: An observer is located in Santiago, Chile. Which part or parts of the celestial sphere would be above the celestial horizon? celestial equator South Celestial Pole none of these North Celestial Pole An observer is located at the North Pole. Which part or parts of the celestial sphere would be above the celestial horizon? 1. North Celestial Pole 2. South Celestial Pole 3. none of these 4. celestial equator

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