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Determine the critical load of a pinned pinned column by the following methods. Solving the second order differential equation.
Find enthalpy and entropy at each phase. Also find all sources of entropy in cycle. Then explain why cycle does not work.
A steam power plant has a high pressure of 3 MPa, and it maintains 60°C in the condenser. A condensing turbine is used, but the quality should not be lower than 90% at any state in the turbine.
5 Lbm of Refrigerant 22 (R-22) is contained in a piston cylinder device. The R-22, initially at a pressure of 30 psia and a volume of 4 ft^3, is heated at constant pressure until the temperature is
Estimate the force and power required to overcome skin friction drag at a cruising speed of 13 kt in sewater at 10 degrees centigrate?
A spring having an unstreched length of 2ft has one end attached to a 10lb ball. Determine the angle of the spring when the ball has a speed of 6 ft/s tangent to horizontal cicular path. k=20lbs.
Saturated mixture of water at 1500kPa is throttled to 100kPa and 150 degree C in a steam line. Calculate the temperature and quality of the water at the inlet.
Consider a space ship in a stationary orbit around a planet. The potential energy of the ship is: U=-Km/r , where K=GM is the gravitational constant times the mass of the planet M, m is the mass of
Calculate the velocity at the exit of a diffuser when air at 100kPa and 20 degree C enters it with a velocity of 500m/s and exit state is 200kPa.
From the model in (a), you should have an equation for the angle ? and another equation for the radial distance r.Consider a stationary orbit ? ?=?_0 with ?_0 constant assumed known.
A shell-and-tube heat exchanger must be designed to heat 2.5 kg/s of water from 15 to 85 oC. The heating is to be accomplished by passing hot engine oil, which is available at 160 oC, through the sh
The hull of a boat has a volume of 150 m3, and the total mass of the boat when empty is 8560 kg. Determine how much load this boat can carry without sinking in a lake.
A long slab is heated to 100degreeC on both sides and then exposed to a focused stream of cold air on the top edge - giving an approximately sinusoidal temperature distribution T = A cos pi/Lx along
A solid circular cylinder of radius R rotates at angular veolicity omega in a viscous incompressible fluid that is at rest far from the cylinder.
If the air around the thermocouple is at 20degreeC and the walls are at 100degreeC, what temperature will the thermocouple read?
If the motor winds in the cable with a constant velocity of 3 m/s, measured relative to the cart, determine how far the cart will move when the block has traveled a distance = 3m up the ramp.
Estimate when the beverage will have a temperature of 15degreeC in mins. Ignore thermal radiation and mention important approximations you must make.
What is the difference between steady state and non-steady state diffusion processes? Use mathematical expressions to explain them. List any two solutions corresponding to the non-steady state diff
What is the probability of an electron being at an energy of kT above the Fermi energy? Calculate the probability of an electron being at an energy of kT below the Fermi energy?
In a gas turbine, natural gas (methane) and stoichiometric air flow into the combustion chamber at 1000kpa, 500K. Secondary air is also at 1000kpa, 500Kpa, is added right after the combustion to res
A ship prototype is expected to travel at a speed of 15 m/s in water. Unfortunately, there is no ability to test a 1/20th scale model in water, so it is tested in a wind tunnel. What air speed woul
With well illustrated diagrams, show how the microstructure of a typical metallic material would change during annealing. Indicate also, how a typical material property such as ductility would chan
How is heat conducted in solids? Which mechanism would you expect to dominate thermal conductivity in Cu? Al2O3?
What is creep failure? Is creep failure of a material a concern at high temperatures? If so why? Explain how creep failure could be minimized. Use well known case examples.
Material A has a fracture toughness and yield stress ten times that of Material B a) Write an expression for the increase (change) in fracture stress of a part by using Material A instead of Materia