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Gaseous hydrogen at 10 bars and 27C is stored in a 100-mm-diameter spherical tank having a steel wall 2mm thick. THe molar concentration of hydrogen in the steel is 1.50kmol/m^3 at the inner surface and negligible at the outer surface, while the diffusion coefficient of hydrogen in stell is appoximately 0.3 x 10^-12 m^2/s. What is the initial rate of mass loss of hydrogen by diffusion through the tank wall? What is the initial rate of pressure drop within the tank?
a 1 hp electric motor drives a water pump. the pump volumetric flow rate is 2103 m3s at 300 k.a determine the head loss
steam enters an adiabatic turbine at 800 psia and 900f and leaves at a pressure of 40 psia. determine the amount of
consider a steam power plant with reheat that operates on a modified rankine cycle. steam enters the high-pressure
Friction between the piston and the cylinder wall can be neglected. For the air, determine the initial and final pressures, in kPa, and the work, in kJ.
a 5.70kg block hangs from a spring with spring constant 1900nm . the block is pulled down 6.80 cm from the equilibrium
argon enters an insulated turbine operating at steady state at 1000 c and 2 mpa and exits at 350 kpa. the mass flow
Friction between the piston and cylinder wall can be neglected because the process occurs so slowly. For the air, determine the initial and final pressures in kPa and the boundary work for the process in kJ.
a tank full of water that is 15 ft high and 10 feet in diameter has a hole in the bottom two inches in diameter what is
In the an ideal turbo jet, the engine is designed such that the turbine work is divided equally between the compressor and the propeller. The gas from the turbine discharges to a nozzle for additional thrust.
The velocity at the inlet is controlled so that it changes according to the following expression. V=a-ct^2, where a = 20m/s, c- 0.8m/s. If the tank initially contains 3kg of liquid water, determine the final mass at the end if 4 seconds of flow.
water is the working fluid in an ideal regenerative rankine cycle with one open feedwater heater. steam enters the
you are trying to loosen a bolt from a piece of metal with a wrench but fail. what kind of wrench should you look
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