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The condenser pressure is 1psia. After determining that the turbine stages and pumps operate isentropically, determine the thermal efficiency of the cycle.
In a vapor-compression refrigeration cycle, R-134a exits the evaporator as saturated vapor at 20lbf/in2. Determine the mass flow rate of refrigerant, in lbm/min.
If the pin is then removed and the air in the cylinder adjusts rapidly to its new state in adiabatic process, determine the pressure, temperature and volume at this new state.
How do you think this will affect the temperature of the final solution if mixed? How do you think making variations in the second volume would affect the final temperature?
Calculate the fraction of sites in lead (Pb) that are vacant near its melting temperature of 327°C. Assume an activation energy for vacancy formation of 0.55 eV/atom.
Calculate the classical radiation loss (Larmor's formula) from an electron bound in hydrogen atom in units of eV/s. Assume that the electron is following a circular orbit with radius of 5x10^-11 m a
The balloon material is such that the pressure inside is always proportional to the square of the diameter. Determine the work done when the volume of the balloon doubles as a result of heat transfe
The back car has twice the inertia (mass) of the front car. When the back car hits the front and the bumpers lock, how fast will the two cars be moving?
What is the kinetic energy of the vehicle in Btu? If gasoline costs $4.10/gallon, how much money is saved by not stopping at the stop sign? Use your answer from part (c).
If 35% of the total mass escapes into the atmosphere while the temperature is held constant, what is the phase of the remaining contents?
Write a short report that outlines both the process if polymerisation and the potential uses of plastics and rubber in engineering?
Calculate the static pressure in the exhaust jet stream at the nozzle exit for the following ambient pressures:4.5 MPa, 3.5 MPa and 0.8 MPa. Calculate the mass flow rate for the same three conditions
Under ideally expanded conditions the exit pressure is 100 kPa; what is the Mach number and the velocity at the exit?
The nozzle is adiabatic and there are no losses. (a) Calculate the flow rate. (b) Determine the throat area. (c) Calculate the exit area.
Determine the maximum steady-state hay temperature for dry hay (q dot = W/m^3), moist hay (q dot = 10 W/m^3), and wet hay (q dot = 100 W/m^3).
Determine the tangential force F and the normal force N acting on the collar when theta = 45 degrees, if the force F maintains a constant angular motion theta dot = 2 rad/s.
The water receives 8 BTU by heat transfer. Determine the temperature, in degrees F, presssure in lbf/in^2, and quality of the water at its final state.
Determine the maximum depth of water possible without the wall tipping over. The wall simply rests on the ground without being anchored to it.
Write a computer program which uses Newton's method to solve for both roots of the following system of nonlinear equations.
Determine the amount of energy transfer by work from the steam to the piston during the process, in KJ. Also determine the initial and final quality and the enthalpy change.
Gas is sampled at atmospheric pressure from the exhaust manifold of an IC engine and analyzed. Calculate the equivalence ratio at which this engine is operating.
Calculate the exhaust-gas composition (both molar AND mass-based) of an SI engine fueled with butane (C4H10) operating at an equivalence ratio of 0.9. Assume the fuel is fully burned within the cyl
Estimate the mass of fuel (mg) and air (mg) entering each cylinder per cycle. The engine displaced volume is 2.4 liters. What is the volumetric efficiency (%)?
Determine the tangential force F and the normal force N acting on the collar when Theta= 45degrees, if the force F maintains a constant angular motion Theta(dot)= 2 rad/s.
Air at an inital temperature of 40 deg C and initial pressure of 200 kPa undergoes a polyatropic process until it reaches a new temperature and pressure of 100 deg C and 400 kPa respectively.