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x B Information Technolog x Y blackboard wit Yahoo x Bb My Grades ENGR15001 x Y webwork wentworth-... x B Wentworth S Registra WeBWork MATH1850 X 1) A Rectangular Tank T http k2/MATH1850-Zakuta/HW HW13 Work and Energy: Problem 3 HW13 Work and Energy Prob Prev Up Next Password/Email Result Entered Answer Preview 415951 J Problems 2.88488E+07 J 2.88488 x 10' J ncO Problem 1 184867. correct 184867 J Problem 2 369734 J 3697 34 J ncO Problem 3 Problem 4 he answers above is NOT co east one (1 pt) A rectangular tank that is 4 meters long, 3 meters wide and 3 meters deep is filled with a rubbing alcohol that has density 786 kilograms per cubic meter. In each Display options part below, assume that the tank is initially full, and that gravity is 9.8 meters per second squared. Your answers must include the correct units View equations as (a) How much work is done pumping all of the liquid out over the top of the tank? o images O Math Jax units 5951.2 J Show saved answers? (b) How much work is done pumping all of the liquid out of a spout 2 meters above the top of the tank? units 28848750 J Apply Opt (c) How much work is done pumping two-thirds of the liquid out over the top of the tank? units 184867.2 J (d) How much work is done pumping two-thirds of the liquid out of a spout 2 meters above the top of the tank? units 369734.4 J Note: You can earn partial credit on this problem Preview Answers Submit Answers Your score was recorded You have attempted this problem 3 times. You received a score of 50% for this attemp 3/21/2016

Explanation / Answer

mass of alcohol = density * Volume

m = 4*3 * 786 * 3 = 28296 kgs

part B : COM raised by 2+ 1.5 = 3.5 m

so

Work done W = mgh = 28296 * 9.81* 3.5

W = 9.71 *10^5 J or 971543.16 J

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part D: W = 9.71 e 5 - 4.15 e 5

W = 5.56 *10^5 J or 556000 J

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