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What are the percent errors associated with the approximation? What does the error and the percent error change to when the proper approximation for the enthalpy is used?
Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 4.43 × 1021 Ge atoms per cubic centimeter.
The gas undergoes a quasistatic process according to the equation 2 PV =constant. The final pressure is 1.0 bars. Determine the work done and the change in internal energy.
Obtain a plot of the approximate (transfer function) model response to a step change in F0 from its initial value to a value of 1.8 m3/min.
How many kilograms per second of air must be supplied? What is the required wet bulb temperature of the supply air? What is the sensible heat factor (SHF) Show all states on the pyschrometric chart.
The volumetric flow rates are 10 m3/s and 6 m3/s, respectively. Determine the dry bulb temperature and relative humidity for the mixture. Also show all state on the psychrometric chart.
If the motorist wishes to pass the light without stopping just as it turns green again, determine a) the required uniform decelertion of the car b) the speed of the car as it passes the light.
Calculate the number of vacancies per cubic meter in some metal at 689°C. The energy for vacancy formation is 0.75 eV/atom.
Determine the maximum height (sb) reached by the ball and the speed of the ball just before it hits the ground. During the entire motion of the ball it is subjected to the force of gravity (9.81m/s2
Determine the velocity and acceleration of the safe when it reaches the opening at E. The rope is 30m long and passes over a frictionless pulley at D. E is 10m from the ground D is 15m from the grou
Calculate the mass of vapor at the beginning and end of the process and the amount of heat and work exchanged between the system and surroundings.
Power generated by the turbing exactly equals this power required by the compressor. Find the cross sectional aread of the engine intake.
Consider a regenerative Rankine cycle with a 600C and 4-MPa throttle, a 5-kPa condenser, and an open feedwater heater at 500 kPa. Calculate the cycle efficiency, and compare it with the simple-cycle
Calculate the magnitude of the total acceleration of her car immediately after she passes point B. Assume BC to be a part of a circular path. [So, AB is a straight line while BC is a circular arc.]
Heat is transferred to a cylinder having a fixed volume of 6 m3 containing 0.1 m3 of saturated liquid water and 5.9 m3 of saturated vapor at 0.1 MPa, until the cylinder is filled with all saturated
What is the liquid composition leaving the sixth equilibrium stage below the total condenser? Solve this problem graphically using a McCabe-Thiele diagram plotted for Alpha(p-c) =1.76.
A piston-cylinder device contains 0.8 kg of an ideal gas. The gas is cooled at constant pressure until its temperature decreases by 10C. Calculate change in internal energy (kJ) of the ideal gas.
Discuss the possible corrosion cells that might be created as a result of this joining process. Recommend a joining process that might minimize corrosion for these cells.
Determine the work done during this process and show the process on a PV diagram. You may consider air to be an ideal gas under these conditions.
Calculate the temperature (K) of butane. Can butane be either cooled or heated to its critical state from its given condition in the rigid tank? Explain.
R-134a is contained in a vertical cylinder fitted with a frictionless piston and a set of stops and the volume is 0.05m^3 when the piston is against the upper stops. Find the work done by the r-134a
The pressure of the gas varies linearly with volume during the process and ideal gas behavior can be assumed for air. Determine the heat transfer if the mass of air is 0.07259 kg.
Air, initially at 85 kPa, 900K and occupying a volume of 0.15 m3, undergoes two processes. Determine the total heat transfer for the two process.
The radiator releases heat to the room, and pressure drops to 100 kPa. Calculate the amount of heat transferred to the room. Draw the process on P-v diagram.