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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.
steam enters a two-stage adiabatic turbine at 8 mpa and 550ordmc state 1 and is expanded to 2 mpa state 2 in the first
r-134a enters the condenser of a refrigerator at 800kpa and 50oc at a rate of 0.018kgs and leaves at 800kpa as a
a 98 kg log is being moved by placing it on two cylinders. when the log has a linear velocity of 2.76 ms a force
an air-water-vapor mixture enters a cooling apparatus at 40 degrees c and relative humidity is 80 percent. design calls
A spring stiffness k= 500 n/m is mounted against a 10 kg block. if the block is subjected to a force of 1 KN determine the velocity of the block at s=0.3 m when s=0, the block is at rest and the spring is uncompressed. The coefficient of fricktion is..
If the rod experienced 28% uniform strain, calculated the load at the onset of necking.
what is the suction specific speed for the pump that is operating under the conditions given in problem 14.16? is this
A body of mass 50 kg is supported by an elastic structure of stiffness 10 kN/m. The motion of the body is controlled by a dashpot such that the amplitude of vibration decreases to one-tenth of its original value after two complete cycles of vibra..
a bending test is used on an experimental cemented carbide material. based on previous testing of the material its
a process requires a conveyor to index cans 2.0 in. in 0.12s and dwell while a cover is pressed onto a can. the cap
50 grams of nickel are melted together with 50 grams of copper, thereby forming 100 grams of a Ni-Cu alloy.
Calculate the operational availability for a power generator with 1 scheduled maintenance per 1000 hours of operation and failure rate of 0.6 failures per 1000 hours.
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