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Natural gas is primarily composed of methane (CH4), while coal can be modeled as eicosane (C20H42). Methane has a heat of combustion of 55.6 MJ/kg, and its molecular weight is 16 g/mol. Correspondingly, eicosane has a heat of combustion of 47.2 MJ/kg, and its molecular weight is 282 g/mol. If you generated the same total amount of heat with each fuel, which would produce more CO2 emissions? By how much?
Calculate the velocity v of the collar as it hits the stop at B if it is elevated from rest at A by the action of the constant 40-N force in the cord. The cord is guided by the small fixed pulleys.
as the hollow steel g 77 gpa shaft shown rotates at 180 rpm a stroboscopic measurement indicates that the angle of
the upside-down steel a frame shown in the figure is to be bolted to steel beams on the ceiling of a machine room using
Use Lagrange"s equations to derive the EOM for the system. You have a function L of some What are Lagrange"s Equations?
Air enters an adiabatic compressor at 0.1 kg/s, 100 kPa, 25 °C and exits at 700 kPa. (a) Draw a schematic of the system. Determine (b) the minimum power input (kW) and (c) the entropy generation rate (kW/K)
A process with Gp= 2/(2s+1) and Gd=1/(2s+1) experiences a disturbance step change of magnitude 5. The SP remains constant. If a P-controller alone with Kc=1 is used and Ga=Gs=1, then what is the output variable, delta Y(t) versus time?
one end of a copper rod 30 cm long is held at 200degc and the other end is held at 93degc. the heat transfer
Compare the time and cost of using the following three alternative methods for casting the concrete for the wall: 1) direct chute 2) pumped 3) crane and bucket.
several geothermal power plants are in operation in the united states and more are being built since the heat source of
assignment 1problem 1determine the analytical solution for the maximum stress of the beam shown compare with stress
a new containment vessel for nuclear waste is being tested by a group of engineersnbspworking for the u.s. department
a dump truck is shown in the figure. the loaded container has a mass of 8000 kg and may be modelled as a solid
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