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When one mole of argon gas is bubbled through a large volume of an Fe-Mn melt of xMn = 0.5 at 1863 K evaporation of Mn into the argon causes the mass of the melt to decrease by 1.5 g. The gas leaves the melt at a pressure of 1 atm. Calculate the activity coefficient of Mn in the liquid alloy.
Two cargo trains each leave their respective stations at 1:00 p.m. and approach each other, one traveling west at 10 miles per hour and the other on separate tracks traveling east at 15 miles per hour. The stations are 100 miles apart. Find the time ..
Refrigerant-134a at 1 MPa and 100°C is throttled to a pressure of 0.8 MPa. Determine the reversible work and exergy destroyed during this throttling process. Assume the surroundings to be at 30°C.
A stiletto heel has a semi-circular cross-section with radius of 0.25 in. Due to walking over irregular surfaces and shifts in body weight, moments of up to 30 lb.-in. can act where the heel attaches to the shoe. Determine the maximum tensile or comp..
A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 390 kPa and 140 degrees C. Determine the heat loss or gain during this process.
a 1.5 ton crate is hoisted by three steel wires. each wire is 1/4 in. in diameter and each carries one-third of the load. determine the stress in the wires.
the steel shaft gst 10.8times103 ksi is made from two segments ac has a diameter of 0.5 in l5in and cdb has a diameter
Gasoline flows from a 0.25 m diameter pipe in which the pressure is 250 kPa, that contracts into a 0.125 m diameter pipe in which the pressure is 100 kPa. If the pipes are horizontal bad viscous effects are negligible, determine the flow rate (Q). (G..
it is proposed that solar energy be used to warm a large collector plate. this energy would in turn be transferred as
question 1approximate the torque and power necessary to rotate the inner 20 cm diameter cylinder shown in figure 1. sae
coming out of a factory chimney are the following gases co2 so2 o2 n2 h2o with volume percentage to be 13.5 0.3 5.2 76
a hot-wire anemometer is a temperature-based instrument for measuring velocities in a flowing gas. the key component of
an accident at a nuclear power plant causes the main valves to close and stop the main water flow that cools the
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