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Assuming that the combustion reaction is controlled by the diffusion of oxygen to the coal particle surface, estimate the instantaneous combustion rate of oxygen (mol/s) by the average size coal par
Write the differential equation to find the temperature in the slab as a function of position. Write the boundary conditions necessary to solve the problem.
As a process engineer, you are asked to determine the emission rate of MeOH vapor from the tank in units of Kg MeOH/day when the tank is a temperature of 30C.
The air used to heat an auditorium flows into the heating unit at a rate of 145 m3/min at -3°C and 100 kPa. What is the temperature of the air exiting from the heating unit?
In a 2-D incompressible flow field, the x component of velocity is given by the equation u = 2x. Determine the corresponding equation for the y component of the velocity if v = 0 along the x-axis?
If the boundary layers on the wing surfaces behave as those on a flat plate, estimate the extent of laminar boundary layer flow along the wing. Assume a transitional Reynolds number of Rexer = 5 &ti
Air of room temperature was in a cylinder and sealed (cylinder is closed). Determine the amount of heat released from the cylinder to outside.
If gear rack B is stationary, while the 25-kg gear rack C is subjected to a horizontal force of P=150 N, determine the speed of C after the gear's center O has moved to the right a distance of 0.3 m
The pump volumetric flow rate is 2 x 10-3 m3/s at 300 K. A. Determine the head loss associated with the pump if the inlet pressure is 90 kPa and the outlet pressure is 300 kPa.
Plot the thickness of the plastic insulation as a function of the heat transfer up to and slightly beyond where it helps then hurts the heat transfer from the ball.
Determine the natural frequency of oscillation.There is a spring on the right side of the pulley's rope. k=1500N/m Radius of pulley=150mm.
Describe what happens in the heat-affected zone of the weld and discuss the problems that might occur. Design a joinging process that may minimize these problems.
Determine T3 in K. - Determine the Power of the exit in the second turbine in kW - Represent those processes in a p-v diagram.
Determine the Work for each of the processes, including the total Work in KJ Determine the Heat (Q) interchanged in each of the processes, including the Total Heat, in KJ.
The water enters the watching machine at atmospheric pressure (100 kPa). A. Assuming all friction losses are negligible, estimate the diameter of the pipe leading from the main line to the machine.
Knowing that when this pendulum in immersed in oil and when given the same initial condition it is found to have a frequency of oscillation of 180 rpm, determine the damping constant for oil.
The cone's base and side form a 90 degree angle on the vertical line shared by both horizontal surfaces. All horizontal sections are circular. Determine the maximum and minimum normal stresses at th
The gas is compressed reversibly to a pressure of 800 kPa. Calculate the work required if the process is: a. Adiabatic b. Isothermal c. Polytropic with n = 1.15
Determine the amount of heat per unit mass entering the boiler. Determine the amount of heat per unit mass leaving the condenser. Find the quality at the entrance to the condenser.
Suppose an identical couple is made from rods of pure lead and pure tin and heated to 175 o C. Draw a similar set of composition profiles. You should refer to the Cu-Ni and Pb-Sn phase diagrams.
What is the flexural strength of this sample in MPa if the load in part (a) is applied? What is I, the moment of inertia, in m4? What is the deflection, y, in mm, at the load given in the problem?
Determine the angular acceleration of the pulley and the tension in the cable connected to the block. The inner radius of the pulley is 150mm and the outer radius is 250mm.
Accounting for variable specific heats determine the final temperature of the mixture, the work required and the entropy change of each constituent in the mixture.
Estimate the outlet temperature of the benzene and the work done by the pump in kW. What assumptions have you made?
What is the temperature of a steam vent on the surface of Antarctica? You can assume that the steam generated by the volcanoes is initially at 1000°C and 300 atm.