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One kg of steam is contained at 200 degC and 1 MPa in a closed, deformable vessel and is expanded to 50 kPa in a reversible, isothermal process. Find the work done and the heat transfer in this pro
Determine by how much the tank dimensions (tank length and tank diameter) change under the combined action of the pressure and axial force.
A 20-kg steel forging at 350degC is quenched by immersing it in a 250 L tank of oil that is initially at 20degC. How much new disorder is produced in this process? By how much did the entropies of the
If the steam undergoes a reversible adiabatic expansion, until a pressure of 600 kPa is reached, what is the exit velocity of the mass?
If the flow rate out of the tank is 10 liters/minute, determine the time (in seconds) to obtain a density of 1010 kg/m^3. Assume freshwater is 1000 kg/m^3, and seawater is 1030 kg/m^3.
Determine the local acceleration, the convective acceleration, and the total acceleration at point 1 and 2 at t = 0. Total acceleration is between 80-100 m/s^2 at x =0, 150-200 m/s^2 at x =2m.
An incompressible fluid flows horizontally in the x-y plane with a velocity given by u = 33 (y/h)1/2, where y and h are in meters and h is a constant.
The water falls through a vertical distance of 150 ft from a reservoir to the turbines. Calculate the power output, and express it in the units of both hp and kW. The density of water is 1.94 slug/f
The air moves in cross flow over the pipe at 15m/s, while the outer surface of the pipe is maintained at 100C. What is the rate of heat transfer from the pipe per unit length?
Calculate the plate surface temperature, Ts(L), and the local convection coefficient, hx(L), at the trailing edge, x = L. Calculate the total rate of heat transfer Q per unit plate width.
A copper wire having diameter d = 4 mm is bent into a circle and held with ends just touching. If the maximum possible strain in the copper is .0024 what is the shortest length of wire that can be u
The air can be modeled as an ideal gas. Determine the mass, in kg and pressure, in kPa in the container after 20 seconds if the temperature is 20 degree C.
If the mass center of the body is displaced 3 cm to the left of its equilibrium position and released from rest, describe the motion as a function of time.
Calculate the Reynolds number and determine whether the flow is laminar of turbulent. The Viscosity and density of blood are approximately 4 cP and 1.06Mg/m^3, respectively.
The rotor starts at t = 0 with no initial velocity; after 2.5 sec, the rotor has completed 5 revolutions. Write the equations of motion for the rotor and determine the angular velcity at t = 2.5sec.
If the wind blows across the wire with a velocity of 25 km/hr, determine the surface temperature. The ambient temperature is 22 degree C.
Calculate the final velocity. Assume that the specific heat at constant volume is 10.0 kJ/kg.K and that the inlet velocity is negligible.
For this gas in the temperature range involved, Cp = 0.84 +0.00075T, where T is in Kelvins and Cp is in kJ/kg. K. Calculate: - the enthalpy change of the gas - the work done on the gas.
Sketch the cycle on a T-s diagram and compute the fraction of steam that is extracted from the turbine at 5 bars, for the feed water heater.
The turbine exhaust pressure is 0.1 bar. The turbine is adiabatic with an isentropic efficiency of 82% and the pump has an efficiency of 78%. Determine the thermal efficiency of the cycle.
The turbine inlet is 140 C and the mass flow rate is 1200 kg/hr. Determine: a. the net work in kJ/kg. b. the thermal efficiency. c. the area of the solar collectors (in m2) if the collector picks up
Find the work output of the heat engine, the efficiency of the heat engine, the temperature of the low temperature reservoir for the refrigerator, in degrees Celsius, and the COP of the refrigerator
If an actual heat pump requires 10 kW of power input for the same temperatures and same heat supplied from -7 degree C, determine the actual COP and the actual heat rejected to the 29 degree C reser
The tested centrifugal pumps are being considered to pump water from reservoir to the tank. Estimate how long will it take to fill the tank: (a) using the parallel configuration, (b) using the serie
Estimate the shaft power required to pump the water at these conditions. Neglect all friction and heat-transfer. Assume temperature of water at he exit is 300K.