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How much error would one expect in determining the specific enthalpy by applying the incompressible-liquid approximation to water at 1500 psia and 400 F?
Helium initially at 327 deg. C and 100 kPa is contained in a frictionless piston-cylinder. The system is slowly cooled at a constant pressure to 27 deg. C. Calculate the work for this process.
A frictionless piston-cylinder contains Argon which is initially at 25 deg. C with a volume of 2.2m^3. Calculate the final temperature of the Argon.
Three shopping carts are initially stationary on a slope, the friction in the wheels allowing them to stay still. A shopper accidentally strikes Cart A, giving it a downward slope speed of 1.1 m/s.
A cylinder/piston contains air under ambient conditions 100kPa and 20 C with a volume of 0.3 m^3. Determine the final temperatur and the net work.
An adiabatic constant-volume contains a mixture of 1kmol of hydrogen () gas and the stochiometric amount of air at 25C and 1atm. The contents of the tank are now ignited. Assuming complete combustio
Determine the equilibrium mole fractions of NO and NO2. Comment on their change with respect to the exhaust gas composition at 2000 K.
Diffusive jumps will be made from the body center atom position to one of its nearest atom positions. List all lattice translation vectors defined by these nearest neighhbor atom jumps;
If these viscosities are the safe limits for the oil, specify the maximum start-up speed and the maximum running speed you would recommend for the pump.
Oil "A" has a viscosity of 80Cst at 40C and 8Cst at 100C. Oil "B" has a viscosity of 90Cst at 40C and 15Cst at 100C. Which oil has the higher viscosity index?
Given the following operating conditions for a rolling bearing, what lubricant would you select and what is the reason for your choice?
An electric current of 0.25 A flows through a 5-ohm electrical resistor placed in an evacuated chamber. The resistor is a 30-mm-long cylinder with a diameter of 5 mm.
Would it be a possible to use a normal domestic refrigerator as a heat source for a small hot tub or whirlpool? If so, would estimate to be the maximum heating rate.
Consider a piston-cylinder assembly containing 0.12 kg of nitrogen at 300 K and 1 atm (state 1). The nitrogen is heated at constant pressure to 700 K (state 2). Plot the process on p-v and t-v coord
Find the relationship between the axial stress sigma, shear stress tau and tensile yield strength Y to cause yielding, according to the Tresca yield critrion?
A temperature measuring devise has been used to measure a dynamic temperature change in a system. The system is no longer available for measurements but the results of the dynamic measurement are av
The downward motion is resisted by an oil film between the piston and the pipe wall. The film thickness is 0.002 inches and the cylinder weighs 0.5 lb. Compute the velocity, V if the oil viscosity i
A stone of 20 kg of mass is held 15 m above a tank containing 200 kg of water. The stone, water and the air are at the same temperature initially.
Determine the instantaneous rate of heat transfer from a 1.5-cm-diameter ball bearing with a surface temperature of 150 C submerged in an oil bath at 75 C if the surface convective heat transfer co
If the air temperature is 60F at standard atmospheric pressure at sea level, and if the differential gage rads a pressure difference of 15psf, what is the air velocity?
Determine the velocity of the ball at the points of the trajectory described by the ball where the radius of curvature is equal to three-quarters of its value at A.
The atmospheric pressure at a location is usually specified at standard conditions, but it changes with the weather conditions. As the weather forecasters frequently state, the atmospheric pressure
Assuming a transition Reynolds number of 5 x 105, determine the distance from the leading edge of a flat plate at which transition will occur for each of the following fluids when u∞ = 1 m/s:
A manometer connected to the tap shows a head of 0.14 in. of mercury above atmospheric. Determine the approximate speed of the air leaving the nozzle if it is at 40°F and 14.7 psia.