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1. Briefly explain the concept of steady state as it applies to diffusion.
2. (a) Briefly explain the concept of a driving force.
(b) What is the driving force for steady-state known that the concentration of nitrogen in the steel at the high-pressure surface is 2 kg/m3. How far into the sheet from this high- pressure side will the concentration be 0.5 kg/m3? Assume a linear concentration profile.
1. A long wire parallel to the x axis carries a current of 6.5 A in the positive x direction. There is a uniform magnetic field B = 1.35 T j. Find the force per unit length on the wire.
A 90-kg man and a 60-kg woman stand at opposite ends of a 150-kg boat, ready to dive, each with a 5-m/s velocity relative to the boat. Determine the velocity of the boat after they have both dived, if (a) the woman dives first, (b) the man dives firs..
suppose 2.00 m3 of air which is considered an ideal gas is initially at a pressure of 101.3 kpa and a temperature of
77 lbm of a gas whose density is .0007 lbm/ft^3 is mixed with 1.81 lbm of a gas whose density is .0018 lbm/ft^3 such that the pressure and temperature of the gases do not change. Determine the resulting mixtures volume (ft^3) and specific volume (ft^..
a power cycle operates between a reservoir at temperature t and a lower temperature reservoir at 280ok. at steady state
a lap joint is made by placing two 38in fillet welds across the full width of two 12in astm a36 steel plates. the
the number of vacancies per cubic meter of a metal at 600degc is 3.11025 vacanciesm3. assume the density of this metal
A system contains a substance that is initially at 100 °C and 1 MPa and it later at 0 °C and 100 kPa. Determine the change in specific enthalpy for the process if the unknown substance is: a) liquid kerosene, b) helium gas (He), c) solid aluminium (A..
consider a regenerative vapor power cycle with two feedwater heaters a closed one and an open one. steam enters the
one kilogram 1 kg of superheated steam at 300 degrees c and 200 kpa is contained in a rigid tank. one thousand 1000 kj
When 0.848 g of finely divided iron is burned, 1.212 g of a reddish brown oxide is obtained. Write a balanced chemical equation for the reaction of iron and molecular oxygen based on the empirical formula.
explain what the equation of motion will become if you have three particles - the first two are sticky and the third
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