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Determine if this refrigerator violates the second law of thermodynamics on the basis of a) the Clausius inequality and b) the Carnot principle.
Now 450 kJ of heat is transfer to water from a source at 500oC, and apart of the liquid vaporizes at constant pressure. Determine the total entropy change for this process, in kJ/K. Is this process re
Find the valve travel, steam lap and the angle of advance. If the exhaust lap is 12.5 mm, find the percentage of stroke at which release and compression will occur.
The speed remains constant during the next 250 mm of the stroke and retards uniformly during the last 125 mm of the stroke. Find the maximum cutting speed?
A small sphere B of mass m is released from rest in the position and swings freely in a verticla plane. Determine the tension in the cord just before the sphere comes in contact with the peg.
Assuming there are no energy losses due to air resistance and therefore that the acceleration is constant. Plot a graph of the kinetic energy of the mass against distance.
The motion of a particle is defined by the relation x=t^3-9t^2+24t-8, where x and t are expressed in inches and seconds, respectively.
A composite requiring a tensile modulus of 25 GPa is to be made from a matrix of density. Calculate the weight fraction of fibres required in the composite.
The wafer is insulated at the bottom. (a) Calculate the radiative heat flux across the gap. b) Calculate heat flux by conduction across the gap.
Taking into account the variation of specific heats with temperature (air-standard analysis), determine the pressure and the temperature at the end of the heat addition process.
The controlled variable in a closed-loop system is a robot arm. Initially, it is at 45 degrees; then it is commanded to go to 30 degrees. Describe what happens in terms of set point, feedback signa
How many possible y components are there? Determine the equation of the streamline for the simplest y component of velocity. Plot the streamlines.
Suppose 550 g of aluminum which has been heated to 150 C is added to 100 g of water which is at a temperature of 25 C. What is the equilibrium temperature for this mixture?
Sketch the process on a p-V or T-s diagram identifying the state points and processes and then, making the "cold air" assumption calculate the following the specific net work transfer.
Now, heat is transferred to the water until the volume quadruples and the cylinder contains saturated vapor only. Determine the internal energy change of the water.
Assuming complete combustion and that the pressure in the container remains constant. Determine the entropy generation during the process on the basis of 1 mole of ethane.
Sketch the arrangements. Draw neat sketches to show how the end-plates each 12mm thick can be joined the shells plates.
A single plate clutch consists of a pair of contacting surfaces. Calculate the power transmitting capacity of the clutch at 500r.p.m using:
Propose two equipment methods, in order of preference, to achieve the above duty, and outline the advantages and disadvantages of each method and the basis of your proposition.
If the pressure at the water surface is atmospheric, what force must be applied at the lower edge of the door in order to keep the door from opening?
If the coefficient of rolling resistance of a cylinder on a flat surface is 0.5inch, at what inclination of the surface will the cylinder of radius r=1ft roll from uniform velocity? What is meant by
The 14 in. spring is compressed to an 8-in. length, where it is realeaed fomr rest and accelerate block A. Calculate the time t for the block to go to 3 in.
It is then reheated to 440C before entering the 2nd stage turbine where it expands to condensor pressure of 0.008MPa. Determine rate of Heat transfer from the condensing steam as it passes through
Determine the magnitude and location of the maximum absolute value of the shearing force and bending moment? Compute the maximum stress due to bending in a round tod of 20mm in diameter if it is subje
The overall volume compression ratio of a reversed carnot cycle working with air as a refrigerant is 10. The temperature limits of the cycle are 40 defree C. determine: the pressure, volume and temp