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Determine the minimum coefficient of static friction between the uniform 50 kg spool and the wall so that the spool does not slip.
A magnesium-lead alloy of mass 5.5 kg consists of a solid phase that has a composition that is just slightly below the solubility limit at 200°C (390°F). (a) What mass of lead is in the allo
A 85.2-kg vertically-falling skydiver experiences an upward force of air resistance of 1340 N. Determine the acceleration (in m/s/s) of the skydiver. (Enter a - value if the direction is downward.)
What is the shape of the graph between velocity and mass of the vehicle ifother factors remain same? What is the shape of the graph between displacement and power?
A copper-nickel alloy of composition 60 wt% Ni-40 wt% Cu is slowly heated from a temperature of 1000°C (2370°F). What is the chemical composition of this liquid phase?
The compressor inlet conditions are 140 kPa and -10.0 oC. If the exit conditions are 900 kPa and 70.0oC, determine the power input to the compressor in kW.
A baggage handler drops your 9.40 suitcase onto a conveyor belt running at 2.30 . The materials are such that μs = 0.530 and μk = 0.190. How far is your suitcase dragged before it is riding sm
Would each process require the same amount of work? If not, which would require more work and why? Would each process require the same amount of force?
A garden hoses with an inside diameter of 5/8 inch is supplying water at a rate of 3 gallons per minute (1 ft3 = 7.481 gal). What is the Reynolds number of the flow? This is all the information give
The wall system is 6m wide by 2.8m high. What is the rate of heat transfer through the wall and temperature drops accross each layer, and surface-ambient air?
Two air flows are combined to a single flow. Flow one is 1 m3/s at 293 K and the other is 2 m3/s at 473K both at 1 bar. They mix without any heat transfer to produce an exit flow same as the flow on
Write a computer program that plots the contour lines of (sigma(1), sigma(2)) on a 2d rectangular beam. Sigma represents the shear stress.
Determine the tower height required to remove 90% of CO2 from air by water in a dilute solution in a packed tower with a 1.5 in metal Pall rings at T=303 k and P=101.32 kPa.
A Carnot refrigerator is maintaining food stuffs in a refrigerated area at 2oC by rejecting heat to the atmosphere at 27oC. It is desired to maintain some frozen foods at -17oC with the same sink te
For thixotropic fluid, (mu) decreases wirh time . assume (mu) depends on time as mu(t) = 10e^(3t) + 2 plot the velocity at mid- channel from t=0 to t=5. what effect of (mu) on wall shear stress?
In a Carnot cycle, heat is supplied at 350 and rejected at 27 . The working fluid is water which, while receiving heat evaporates from liquid at 350 to steam at 350 . The associated entropy change i
Draw either a pv or Tv diagram for this problem. Calculate the mass of liquid, mass of vapor, and the total mass of water in the tank at the initial condition.
A garden hoses with an inside diameter of 5/8 inch is supplying water at a rate of 3 gallons per minute (1 ft3 = 7.481 gal). What is the Reynolds number of the flow?
To produce 2.45 x 109 W of electricity from the water's potential energy, what mass flow rate of water is required? [Assume all potential energy is converted to electricity.]
The spring has squared and ground ends and is made from ASTM A227 4.0mm wire, without presenting. Using a 15% clash allowance find the number of coils required.
A 19th-century piston engine ran on steam. The steam supply is at 5 bar and 350oC. The steam discharges to the atmosphere at 1 bar and saturation temperature.
You have been asked to design a set of pumps to transfer liquid from a storage tank into a distillation column. What design issues do you have to consider ?
Water at 20 degrees celcius flows by gravity through a smooth pipe from one reservoir to a lower one. The elevation difference is 60m. The pipe is 360 m long, with a diameter of 12cm. Calculate the
A flange is used for instrument connection for a system with a design temperature of 316°C (600°F) and a design pressure of 1000 kPa (145 psi).
A high strength steel has a yield strength of 1460 MPa and a KIC= 98 MPa m1/2. Calculate the size of a surface crack that will lead to catastrophic failure at an applied stress of half of yield stre