A horizontal tube to be used as a packed-bed reactor is 10 cm in diameter and 1m in length. It is packed with 1 mm diameter spherical catalyst particles. The void fraction is 0.37. The reactor exit is at 1 atm and the inlet pressure is 11 atm. The gas is methane and the temperature is 20 oC. What is the mass flow rate?

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.