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What is the total rate of heat transfer from a 1 m x 1 m section of the surface at 100 deg.C, if a bundle of the rods is installed on 4-mm centers?
A piston-cylinder assembly with initial volume of 80 liters contains 4 kg of R-134a at a pressure of 160 kPa (state 1). Then, R-134a expands to a volume of 0.4916 m^3 at constant pressure (state 2).
The specific internal energy decreases by 5 kJ per kg and the acceleration of gravity is constant at 9.8 m / s2. Determine the work for the process, in kJ.
A piston- cylinder assembly with initial volume of 80 liters contains 4kg of R-134a at a pressure of 160 kPA (state 1). Then R-134a expands to a volume of 0.4916m^3 at constant pressure (state 2).
So, in the winter, given the flow rates from part a and the lower temperature cold water feed, what will be the temperature of the water coming out the showerhead?
The low pressure side concentration is 0.102 kg/m *h. Calculate the thickness of the material (in mm). D = 0.75 * 10^-10 m^2/s.
A 3000-lb car accelerates under constant power from 60 mile/h to 90 mile/h on a 0.25 mile straight, level test track. Determine the horsepower that is delivered to the drive wheel. What is the powe
In the system below for measuring fluid viscosity, the inner cylindrical core is stationary; the outer cylindrical shell is rotated at a constant angular velocity of 900 revolution per minute; and t
Obtain the equation for the flow streamlines for a = b = 2 s^-1. Plot several streamlines in the first quadrant for a = b = 2 s^-1, including the one that passes through the point (x, y) = (1,1).
A piston-cylinder device contains 0.8 kg of steam at 300°C and 1 MPa. Steam is cooled at constant pressure until one-half of the mass condenses.
A 50 kg crate rests on a rough horizontal surface with µk=0.3. An electrically powered winch is utilize to accelerate the crate at a constant rate until it reaches a speed of v=5 m/s within a
A steam power plant receives 1000 Btu/s in the boiler at 1250 F and discharges 600 Btu/s in the condenser at 80 F. The pump requires 25 Btu/s.
A 3000-lb car accelerates under constant power from 60 mile/h to 90 mile/h on a 0.25 mile straight, level test track. Determine the horsepower that is delivered to the drive wheel.
The 0.78 kg bob of a pendulum is fired from rest at position A by a spring which has a stiffness of k = 1.62 kN/m. The spring is initially compressed 125mm.
A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it through the resistors where it is heated.
Consider a rocket engine that burns hydrogen and oxygen. The combustion chamber temperature and pressure are 3800 K and 1.5 MPa respectively, the velocity in the combustion chamber being very low.
Kic for the aluminum alloy used in making a structure is 45MPa(m)^0.5. If the structure contains a crack 2.5mm long, what is the applied stress that will casuse fracture?
What mass of waste brine is expelled in one day? What is the ratio of the mass of fresh water produced to the mass of water in the incoming brine?
Consider a device with one inlet and one outlet. If the volume flow rates at the inlet and at the outlet are the same, is the flow through this device necessarily steady? Why?
A copper rod 50mm long and 5mm in diameter extends horizontally from a casting at 300 C. The rod is in an air enviroment with T∞ = 26 C and h = 36 W/m2K and the fin tip is insulated.
What is the flow rate, m3, of the gasoline and kerosene stream coming off the first column? What is the composition of m7, the heating oil and lubricating oil stream coming off the second column?
A long cylinder of radius ro=20cm, and thermal conductivity k=3 w/mK is immersed in a fluid of convection coefficient h=30W/m2K and the unknown temperature T∞.
An adiabatic control volume with steam as the working fluid operates at steady flow conditions, with the inlet state of 4000 kPa, 300°C, with a velocity of 40m/s.
A hollow sphere is constructed of aluminum with an inner diameter of 4 cm and an outer diameter of 8 cm. The inside temperature is 100 C and the outer temperature is 50 C.
Vector s makes angle of 45 degree with x-axis , and 60 degree with y-axis , and it is also in the positive octant. What is the angle between r and s?