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Determine the microstructure for eutectoid steel that has undergone the following heat treatment. For each heat treatment you may assume that you start with austenite at 760ºC.
Determine the average resistance R to motion over the runway length due to drag (air resistance) and mechanical retardation by the landing gear.
The pan is hot (80C) and the room is cool (20C). Calculate the rate of heat transfer from the pan to the room by convection and radiation combined.
Calculate the rate of heat transfer to the room and the air. Include both natural convection and radiation. Repeat the calculation for an emissivity value of 0.1.
In that area, the average wind speed is 24 km/h at an air temperature of 10 degrees C and pressure of 0.9 atm. The rotor has a diameter of 1.25m. What is the electrical power available?
Knowing that it strikes the water 4s after release, determine: (a) The speed at which the stone was thrown upward. (b) The speed at which the stone strikes the water.
Assuming a uniform convection coefficient of h=100 W/m^2*K over the entire fin surface, determine the fin heat tranfer rate; efficiency Nf and the effectiveness Ef.
Young's modulus for AISI/SAE 1045 steel is 29.0 x 10 ^6 psi and its poisson's ratio is 0.32. What are its shear and bulk modulus?
Methane (CH4) at 25 degree Celcius, 1 bar enters a furnace operating at steady state and burns completely with 240% of theoretical air entering at 400K, 1 bar.
How should the company hire and train its new employees so that the labor cost is minimized? Formulate the problem as a linear program.
What is the overall accuracy error (systematic error)? Discuss what corrective action, if any, should be taken to make the micrometer more precise.
A piston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kPa. Determine the total mass of the water.
Determine the power transmitted to the pulley, in horsepower, and the rotational speed of the pulley, in rpm. The acceleration of gravity is g = 32.0 ft/s^2.
The steel of the bend material weighs 51 kg. Neglecting friction or other losses in the pipe, what is the tension force in the bolts holding the bend in place?
Determine the yearly electrical cost to operate this motor. Is it advisable to replace the motor with a new 95% efficient unit if the replacement cost (with trade in) is $5,000?
How many seconds will it take for the lactate concentration at the center of the muscle to drop to one-tenth the initial value?
Find the permeability of the Membrane for transport from side A to side B. Would the magnitude of sucrose flux through the membrane be the same if the fluid concentrations were reversed?
The acceleration of gravity is g 32.0 ft/s2. Determine the power transmitted to the pulley, in horsepower, and the rotational speed of the pulley, in RPM.
What is the heat transfer rate (in kW) to the house? Develop the energy balance for the house and use it to determine how long will it take (in min) for the temperature in the house to rise to 22 C
The temperature reaches 1800 K at the end of the combustion process. Assuming variable specific heats. Determine the maximum pressure, P2 (in Kpa).
A viscous fluid flows past a flat plate such that the boundary layer thickness of a distance "D" from the leading edge is "h". Determine the boundary layer thickness at a distance "L" from the leadi
Determine cycle efficiency. Determine mass flow rate of the condencer cooling water in kg/h if water enters at 15 degrees celcious and exits 25 degrees celcious.
A drug delivery system is based on a new design of catheter. How long will it take to supply the required amount of drug?
The bottom wall of the channel is noticeably rough at a distance of 1 m from the exit. Will flow disturbances created by the roughness affect measuring sensors distributed along the top wall? Why?
What is the stagnation pressure and Mach number of flow entering nozzle? What should throat and exit area be if exit mach number is 2?