Flow enters a heated duct at v1 = 2000 m/s, T1 = 300 K, and q...

Flow enters a heated duct at v1 = 2000 m/s, T1 = 300 K, and q = 5 x 105 J/kg. Find Mach1 and Mach2 for He, Ne, Ar, Kr, and Xe

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samet mamat answered 2 years ago

A bus driver heads south with a steady speed of v1 = 20.0 m/s for t1...

A bus driver heads south with a steady speed of v1 = 20.0 m/s for t1 = 3.00 min, then makes a right turn and travels at v2 = 25.0 m/s for t2 = 2.60 min, and then drives northwest at v3 = 30.0 m/s for t3 = 1.00 min. For this 6.60-min trip, calculate the following. Assume +x is in the eastward direction. (a) total vector displacement (Enter the magnitude in m and the direction in degrees south of...

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Nitrogen (N2), at 300 K, 1 bar with a mass flow rate of 1 kg/s enters an insulated mixing chamber and mixes with carbon dioxide (CO2) entering as a separate stream at 500 K, 1 bar with a mass flow rate of 0.5 kg/s. The mixture exits at 1 bar. Assuming ideal gas behavior, for steady-state operation, determine (a) the molar analysis (i.e., the molar flow rate for each gas) of the exiting mixture, (b) the exit mixture temperature, and...

Air (280 K and atmospheric pressure) enters a 3-m-long rectangular duct (0.15 m by 0.075 m)...

Air (280 K and atmospheric pressure) enters a 3-m-long rectangular duct (0.15 m by 0.075 m) whose surface temperature is at 400 K. Air mass flow rate is 0.10 kg/s. Find the heat transfer and the outlet temperature. Use the Sieder-Tate equation to solve for the heat transfer coefficient.

Air flows through a 0.25-m-diameter duct. At the inlet the velocity is 300 m/s, and the...

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Liquid mercury at 0.5 kg/s is to be heated from 300 to 400 K by passing...

Liquid mercury at 0.5 kg/s is to be heated from 300 to 400 K by passing it through a 50-mm-diameter tube whose surface is maintained at 450 K. Calculate the required tube length by using an appropriate liquid metal convection heat transfer correlation. Compare your result with that which would have been obtained by using a correlation appropriate for Pr>= 0.7.

Air is cooled from 300 K to 273 K as it flows steadily through a duct....

Air is cooled from 300 K to 273 K as it flows steadily through a duct. Frictional dissipation may be neglected. Cooling is achieved by removing heat via a heat pump. The work requirement is 1.15 times that of a reversible heat pump operating between 263 and 310 K. For each mole of air flowing through the duct, calculate: Air can be assumed an ideal gas with a constant heat capacity cP of 3.50R. The temperature of the surroundings is...

At a point in a circular duct with inner diameter of 0.200 m, the flow is...

At a point in a circular duct with inner diameter of 0.200 m, the flow is fully developed and the air flow average velocity is 10.0 m/s with a mean temperature of 20.0° C. At a point exactly 5.00 m downstream, the mean temperature is 30.0° C. It is known that the wall temperature of the duct was held at a constant temperature between these two points. Find this wall temperature.

Atmospheric air enters the heated section of a circular tube at a flow rate of .005...

Atmospheric air enters the heated section of a circular tube at a flow rate of .005 kg/s and a temperature of 20 degrees Celsius. The tube is of diameter D = 50 mm, and fully developed conditions with h = 25 W/m^2K exist over the entire length of L = 3m. a) For the case of the uniform surface heat flux at q''s = 1000 W/m2 , determine the total heat transfer rate q and the mean temperature of the...

A 5-cm diameter copper ball is heated to 300 C. Take h = 10 W/m^2*K. A)...

A 5-cm diameter copper ball is heated to 300 C. Take h = 10 W/m^2*K. A) Make a graph of temperature versus time for copper then for aluminum. Include the Matlab script or Excel data tables for these 2 graphs. B) What value of K would make it so that this situation could not be treated as a lumpted system (Biot-Number < 0.1)?

Air enters a horizontal, constant-diameter heating duct operating at steady state at 280 K, 1 bar,...

Air enters a horizontal, constant-diameter heating duct operating at steady state at 280 K, 1 bar, with a volumetric flow rate of 0.25 m3/s, and exits at 325 K, 0.95 bar. The flow area is 0.05 m2. Assuming the ideal gas model with k = 1.4 for the air, determine: (a) the mass flow rate, in kg/s, (b) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer to the air, in kW

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