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What is the possible power (kW) production from a 32 m radius wind turbine if the average wind speed is 12 m/s? Assume an ambient air density of 1.20 kg/m3.
Consider a well sealed, well insulated room with a common household refrigerator/freezer unit. What type of energy crosses the room boundary?
A particle is moving with a velocity of Vo when s=0 and t=0. If it is subjected to a deceleration of a = (-K)v^3, where K is a constant, determine its velocity and position as functions of time.
The amount of energy required to bring the vehicle to a stop is 600 KJ. Can you calculate the speed at which the brakes began in km/hr?
It is known that tha initial velocity vector akes an angle of 30 degre anglewith the horizontal. Determine the range of launch of speeed v0 for which the ball will land inside the box?
How thick does the 4140 steel need to be if it is a cyclander with a diameter of 8.252 inches and is 1.5 inches deep and overall thickness is 2.0 inches.
Determine (a) the thermal efficiency of the cycle, (b) the mass flow rate of steam, in kg/h, (c) the rate of heat transger out from the condensing steam as it passes through the condensor, in MW.
Calculate the specific volume for carbon dioxide gas at 450 K and 4000 kPa using (a) ideal gas equation, (b) compressibility chart, and (c) van der Waals equation.
Determine the volume of the tank, in m^3, and the final pressure, in bar. Also, show the process on both a P-v and T-v diagram.
Combustion heats it to 1500 K in a constant-volume process. What is the mass of air (lbm), and how high does the pressure become (psia)? Show the process on both a P-v and T-v diagram.
The cooling continues to -10 degrees celcius (state 3). Show the processes 1 to 2 and 2 to 3 on one P-v and one T-v diagram.
The ultimate strengths in tension and compression are 210 and 500 MPa respectively. Determine the factor of safety based on the MPS theory.
If the collar starts from rest at A under the action of the constant 2.9-lb horizontal force, calculate its velocity v as it hits the stop at B.
Compute the minimum possible radius of the specimen without fracture, given that the applied load is 5560 N (1250lbf), the flexural strength is 105 MPa (15,000psi).
Heat is transferred to the tank in order to maintain constant temperature. Determine the heat transfer to the tank when half of the contents of the tank has been removed.
The maximum allowable shear stree tallow in the wall of the cylinder is 42 Mpa. What is the minimum permissible thickess tmin of the cylinder wall?
Briefly explain (a) why there may be significant scatter in the fracture strength for some given ceramic material, and (b) why fracture strength increases with decreasing specimen size.
Find the actual and Carnot thermal efficenciencies of this heat engine. How much power does the heat engine produce?
The second stream of air has 2 kg/s of air (state 2) entering at (600K, 1 bar). The two streams mix, and leave at state 3. If the temperature at state 3 is 402K, find the heat gain or heat loss.
An electric heater inside the cylinder is now turned on and 2200 KJ of energy is transferred to the stream. Determine the entropy change of the water during this process.
Determine the final temperature and the work done during this process, assuming constant specific heat Variable specific heat.
The inside of the pipe carries hot water at 50 oC and outer surface of pipe is at 10 oC. Calculate the heat loss per meter length and the temperature between the two materials.
Find a transfer function between armature voltage and displacement of the diaphragm. What is the order of this system?
Calculate the inside temperature when the outer surface is maintained at 20oC. The thermal conductivity of the insulation is 0.043 W/m K and 0.2 W/m K for the liner.
Find the speed which makes the cost of a voyage of 2000 sea miles a minimum. Appreciate if you could give a detailed solution.