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The first atomic explosion was detonated in the desert north of Alamogordo, New Mexico, on July 16, 1945. What fraction of the strontium-90 ( years) originally produced by that explosion still remains as of July 16, 2006? In Addition, Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.1 days. If a patient with thyroid disease consumes a sample of Na131I containing 10 of 131I, how long will it take for the amount of 131I to decrease to of the original amount?
Discuss the applicability of each model - Does it differ based on the interactions you would expect for each model. Can you conclude that one of the models is 'better' than the others from your graphs/analysis in Problems 3.1-2?
Calculate the fraction of water that is condensed from the air, the relative humidity of the air at 100°C, and the ratio m3 outlet air at 100°C/m3 feed air at 90°C.
A paint mixture containing 25% of pigment and the balance water sells for $18.00/kg, and a mixture containing 12.0% pigment sells for $10.00 kg. If a paint retailer produces a blend in containing 17.0% pigment, for how much ($/kg) should it be sold t..
1. the potential energy between two atoms can be represented as
the dot regulation at 49 cfr 174.450 previously stipulated that when fire occurs in a domestic rail shipment of
An electron falls from the conduction band of silicon (Si) to the valence band. The band gap of Si is 1.1 eV. What is the wavelength of the photon emitted by this process? Give your answer in nm
Propane in the feed to the unit and 80% of the pentane fed to the unit. The mole fraction of butane in the distillate is yB ? 0.4 . The bottom stream contains all of the hexane fed to the unit. Calculate the distillate and bottoms streams flow rate a..
A fresh feed stream containing 4.0 mol% inert gas and a stoichiometric ratio of hydrogen and nitrogen is combined with a recycle stream and is fed to a system to produce ammonia according to the reaction: N2 + 3H2 = 2NH3
The massive emission of carbon dioxide (CO2), the major component of greenhouse gasin the environment, is receiving significant attention around the world. This has led tonumerous proposals to sequester or eliminate the CO 2. One of the options is..
A human being (75 kg ) consumes about 6000 Kj of food per day. Assume that the food is all glucose and that overall reaction is- C6H12O6 +6O2 ------à 6CO2 +6H20 , Δ H= -2816 KJ
with an atomic weight of 51.9405 amu, 9.50% of 53Cr, with an atomic weight of 52.9407 amu, and 2.37% of 54Cr, with an atomic weight of 53.9389 amu. On the basis of these data, confirm that the average atomic weight of Cr is 51.9963 amu.
Aniline is manufactured by the hydrogenation of nitrobenzene in a fluidized bed reactor. The reactor operates at 250 °C and 20 bar. The reactor vessel is approximately 3 m diameter and 9 m high. Suggest suitable materials of construction for this ..
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