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a person conducts an experiment in which he rides in an elevator while standing on a set of scales that displays his
the schussing skier is on a 25deg slope his mass is 80 kg the kinetic coefficient of friction between his skis and the
a 2-kg can containing 8 kg of water is initially stationary i fig a i the center of mass of the object consisting of
the combined weight of the motorcycle and rider is 360 lb the coefficient of kinetic friction between the tires and the
the mass of the bucket b is 1 80 kg the acceleration of its center of mass at the instant shown isdetermine the x and
during a test flight in which a 9000-kg helicopter starts from rest at t 0 the acceleration of its center of mass
a diesel power station has the following data bullfuel consumptionday 1000 kg units generatedday 4000 kwhbullcalorific
question 1- in each circuit of figure 1 identify the series and parallel relationships of the resistors viewed from the
in many fermentations the maximum amount of cell mass must be obtained however the amount of mass that can be made is
when food supplies have been exhausted populations die away this exponential decay is described by a simple
as a waste moves downstream exertion of the oxygen demand removes oxygen from the water and exchange with the air
1 a waste contains 100 mgl of acetic acid ch3cooh and 50 me of nh3-n determine the theoretical carbonaceous oxygen
1 a new wastewater-treatment plant proposes a discharge of 5 m3s of treated waste to a river state regulations prohibit
1 a waste has an ultimate cbod of 1000 mgl and a kl of 01 day-1 what is its 5-day cbod2 calculate the ultimate bod of a
the project tasks are outlined on the following pages the student must produce a typed report including equations
figure 5-11 showed world population growth over the past 2000 yearsa what population-growth model apparently describes
a 100 mw steam station uses coal of calorific value 6400 kcalkgthermal efficiency of the station is 30 and electrical
organic carbon c and ammonia nitrogen nh3 are oxidized to carbon dioxide co2 and nitrate no3- respectively by bacteria
the relation between water evaporated w kg coal consumption c kg and kwh generated per 8-hour shift for a steam
a copper rod of 40mm dai surroundedhighly by a cast iron tube of 80mm external dia the ends being firmly fasten
for each of the cases below assuming all other things unchanged describe the effect of the following parameter
it has been estimated that a minimum run off of approximately 94 m3sec will be available at a hydraulic project with a
1 a stream with a temperature of 25degc has a dissolved-oxygen concentration of 4 mgl what is the dissolved-oxygen
a river traveling at a velocity of 10 kmday has a dissolved-oxygen content of 5 mgl and an ultimate cbod of 25 mgl at
a 132 kv line with 1middot956 cm dia conductors is built so that corona takes place if the line voltage exceeds 210 kv