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A 25.0-mL aliquot of an aqueous quinine solution was diluted to 50.0 mL and found to have an absorbance of 0.656 at 348 nm when measured in a 2.50-cm cell.
A second 25.0-mL aliquot was mixed with 10.00 mL of a solution containing 25.7 ppm of quinine; after dilution to 50.0 mL, this solution had an absorbance of 0.976 (2.50-cm cell). Calculate the concentration of quinine in parts per million in the sample.
The beam consists of a W360 x 79 structural steel wide-flange shape [E = 200 GPa; I = 225 x 106 mm4]. For the loading shown, determine the reactions at A, B, and C (positive if the force is up, negative if down).
determine the smaller of the two section moduli for the beam. (Recall that section modulus is equal to bending moment divided by maximum bending stress.) In which material does the maximum stress occur?
the azimuth from station a of a link traverse to an azimuth mark is 212o 12 36. the azimuth from the last station of
1. It is desired that the reflectivity of light at normal incidence to the surface of a trans- parent medium be less than 5.0%. Which of the following materials in Table 21.1 are likely candidates: soda-lime glass, Pyrex glass, periclase, spinel,..
A piston-cylinder device contains 1.0 kg of liquid water and 0.01 kg of water vapor (steam) in equilibrium at 7 bars. The pressure is held constant and heat is added until the temperature reaches 280 C.
a machine table driven by closed loop positioning system consists of a motor gearbox lead screw and an optical encoder.
steam is contained in a closed rigid container. initially the pressure and the temperature are 1.4 mpa and 250degc
A power plant uses the ranking cycle. the maximum desired temperature in the boiler is 500C. If the turbine is reversible, and the outlet of the turbine (input to condenser) is saturated vapor at p=25kPa,
What are the duties of a by-product plant? What are ammonia stills? What is ammonia incineration? What is stamp technology of coke making?
Calculate the rate at which radiation is incident on A3 due to emission and reflection from A1.
Ideally this is a brief title describing the main project theme. e.g. Design of a Domestic Security System. Name and Programme of Study Clearly identify your name, the programme of study. Aims of the Project Between 3 and 6 aims (more does n..
Also find out a compression ratio and inlet pressure to give maximum imep. engineering fundamentals of internal combustion enignes - pulkrabek.
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