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Compare these fibers as the reinforcing material in PMC materials. In what types of applications might you chose each of them, keeping in mind stiffness, strength, density and cost factors?
The overall heat transfer coefficient is 500 W/m2K. The design condition calls for a total heat transfer rate of 3000W. What is the length of the heat exchanger.
Air at 293 K and 1 bar is blown over the rod at 2.5 m/s. Calculate 1) The temperature at the mid-plane of the rod. 2) The heat dissipated by the rod.
Design a single axis s/c attitude controller. Find the derivation for the system block diagram (Hint: sum of the torques). Show supporting computations.
The steam then enters the second stage and exits at 14.7 lbf/in^2. The isentropic efficiencies of the stages are 85% and 91% respectively. Show the principal states on a T-s diagram.
Heat is rejected to the surroundings at the rate of 0.25 kW and the rate of steam flow through the turbine is 0.38 kg/s. Calculate the power developed by the turbine.
The heat transfer coefficient for convection between the chip and the coolant is 150 W/m2K. What is the cause of entropy production in this case?
40-m long section of a horizontal steam pipe of 6-cm in outside diameter has a surface temperature of 170C and emissivity of 0.7. The pipe is in a room with air at 30C.
What is the magnitude of the shearing force on the upper plate if it is 2.2 m long ( in the direction of flow) and 1.1 m wide?
The oil properties are Density, p = 900 kg/m3, cp = 2000 J/kg K, and (mu) u = 0.765 N s/m2. Calculate the pressure drop, the flow work, and the temperature rise caused by the flow work.
Compute the ratio of power in the wind that appears at the tip of the top blade relative to the power that appears at the elevation at the tip of the bottom blades.
Determine the power required, in kW, to heat the house using electrical resistance elements and compare with the minimum theoretical power that would be required by a heat pump.
A Carnot cycle heat engine using 1 kg of air has the following conditions: Heat addition beginning at 15 MPa. Assuming constant specific heats at 750 K. Determine the work for each of the processes in
Using the ideal gas model, plot the final temperature, in Kelvin, and the final mass, in kilograms, of the air inside the cylinder for supply temperatures ranging from 300 to 500 K. Show your work f
Determine (a) the time required for the flywheel to reduce its CW angular speed to 900 rev/min, (b) the time required for the flywheel to reverse its direction of rotation.
Determine the terminal velocity of a 75-mm diameter sphere made of solid aluminum (specific weight= 26.6KN/m^3) in free fall in (a) castor oil at 25 degrees C.
Determine the specific volume of the saturated vapor at the end of the process. Calculate the amount of energy transfer by heat into the tank during the process in BTU.
Consider an internal combustion engine operating on the ideal Dual cycle with the conditions. Determine:(a) Engine thermal efficiency(b) Engine power output(c) Engine MEP(d)Exhaust turbine power.
Can the handle remain cool, when the pan is filled with water and brought to a boil for a considerable time on a conventional stovetop? Discuss different possibilities.
The radius of the tire is 8 in. What are the linear momentum relative to the wheel axle for the pebble in (gm*m)/s. What are the angular momentum about the wheel axle for the pebble?
The work required by the heat pump is supplied entirely by a Carnot heat engine, which operates between a hot reservoir at 220 °C and a cold reservoir at the ambient temperature. Find work outpu
Suppose we take 25 i.i.d observations from normal distribution with population standard deviation known to be 30. Given the same population standard deviation, how many observations need to be colle
How many Si atoms and how many O atoms are present per millimeter of length in a fiber that is 10 micrometers in diameter?
The unit operates adiabatically at steady state. The rate of heat transfer to the moist air passing through the heating section in kJ per kg of mixture.
Determine the amount of cooling in kJ required and water removed in kg per 1000 m of dry air processed at the entrance to the system.