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Consider a degenerate gas of electrons at a density of 1029/m3 (about the density of conduction electrons in metals) and at a temperature of 0 K.
(a) What would be the Fermi level?
(b) What would be the average energy per electron?
(c) If you let this gas expand freely until the electrons were sufficiently far apart that they could be treated as a classical gas, what then would be the temperature of the gas?
Write the combustion equation for the complete combustion of methane in a furnace chamber with 200% theoretical air and 20% percent excess air. Take into account that some of the oxygen is lost to the surface wall material of the furnace. Find the ..
Assuming the plant operates on the ideal vapor-compression cycle using refrigerant 134-a between the pressure limits of 120 and 700 kPa, determine - The mass flow rate of refrigerant
Population growth. The population of some countries has a relative growth rate of 3% (or more) per year. At this rate, how many years (to the nearest tenth of a year) will it take a population to double?
Superheated steam in a piston-cylinder device is initially at 200 °C, 600 kPa. Heat is removed from the system during an isobaric process until half of the mass condenses to saturated liquid
The length of the stem protruding above the fluid surface of the liquid in which the hydrometer floats is a function of the specific gravity of the liquid. If the mass of the hydrometer is 0.045 kg and the cross-sectional area of its stem is 290 m..
How many governing field equations can be formulated from the conservation laws? How many unknown field variables are there? and What are the missing equations?
a 4 kg object traveling at 60 ms enters an insulated vat of 20 kg of incompressible fluid c 2.0 kjkgk and comes to
two solid cylinders rods AB and BC are welded together at B and loaded. determine the magnitude of the force P for which the tensile stress in rod AB is twice the magnitude of the compressive stress in rod BC?
at a given instant in time flywheel oa is caused to rotate with angular velocity of w2radsec and angular acceleration o
Using the results of Problem 17.13, compute the corrosion penetration rate, in mpy, for the corrosion of iron in HCl (to form Fe2 + ions) if the corrosion current density is 8 X 10-5 A/cm2.
A metal block, placed on a rough surface, is attached to a spring and is given an initial displacement of 10 cm from its equilibrium position. It is found that the natural time period of motion is 1.0 s and that the amplitude reduces by 0.5 cm in ..
Steam produced at 70 bar and some unknown temp. A small amount of steam is bled off just before entering a turbine and goes through an adiabatic throttling valve to atmospheric pressure. The temp of the steam exiting the throttling valve is 400C.
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