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The penicillin in a mixture was determined by adding 0.981 mg of the 14C-Iabeled compound having a specific activity of 5.42 X 103 cpm/mg. After equilibration, 0.406 mg of pure crystalline penicillin was isolated. This material had a net activity of 343 cpm. Calculate the mass in milligrams of penicillin in the sample.
Working with processes of an application to ideal gases., While its temperature remains constant at 80 degrees F, 2.5lb of a certain gas, whose cp=0.28 and cv=0.2Btu/lb-degreeR
Please circle item(s) which is (are) intensive properties: Please circle the item(s) which can be considered as pure substance in Thermodynamics: Please circle the valid statement(s) about superheated vapor with temperature T and pressure P:
refrigerant 134a enters a compressor operating at steady state as saturated vapor at -8 degress celcius and exits at a
A centrifugal pump is used to raise water against a static head of 18.0 m. The suction and delivery pipes, both 0.15 m diameter, have, respectively, friction head losses amounting to 2.25 and 7.5 times the dynamic head.
A gantry structure, similar to a tire swing, is used to test the response of an airplane during a crash. A 8000kg plane is hoisted back until the 20m swing cable is at theta=60. Determine the speed of the plane just before crashing into the ground at..
List three different factors responsible for the increase in pressure resulting from the transfer of heat to the tank. List ways in which this accident could have been avoided.
a 50 kg copper block initially at 350 c is quenched in a closed rigid insulated tank containing 120 l of liquid water
a cylinder made of astm a242 steel is 50cm in diameter and 250mm long and has a wall thickness of 24mm. a round bar of
Sketch the graphs of both f (t) and the periodic function represented by the series expansion for -2 t 2.
Determine the phase or phases in a system consisting of h20 at the following conditions and sketch p-v and t-v diagrams showing the location of each state (a)p=100 lbf/in^2, T=327.86F (b)p= 100lbf/in^2, T240F. (c)T=212F, p=10lbf/in^2 (d)T=70F, p=20lb..
consider a reheat cycle with steam leaving the boiler and entering the turbine at 4 mpa and 400 c . after expanded in
Calculate the concentration (in weight percent) of molybdenum that must be added to tungsten to yield an alloy that contains 1.51 x 1022 Mo atoms per cubic centimeter.
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