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Draw a free body diagram of the spring cut near the point A and identify the internal forces and moments transmitted across the cut. Hence determine the magnitude and location of the maximum shear str
A well-insulated rigid tank contains 5 kg of a saturated liquid-vapor mixture of water at 150 kPa. Initially, three-quarters of the mass is in the liquid phase. An electric resistance heater placed
Calculate the mole fractions (dry basis) and the ppm (parts per million on a wet basis, or moles contained in 106 moles of the wet stack gas) of the stack gas species that might be considered enviro
A 4 lb block with an initial velocity of 5 ft/s is sliding down a 30 degree slope before being slowed by a spring. What is the velocity of the block when the spring has been compressed 1 ft?
A heat pump is used to maintain a house at 22 C by extracting hear from the outside air on a day when the outside air temperature is 2 C. The house is estimated to lose heat at a rate of 110,000 kJ/
Determine (a) the exergetic effectiveness and (b) the exergy destroyed. The surrounds can be taken to be To= 20°C, Po = 100 kPa.
Two meshing helical gears have a 25 degree transverse pressure angle and a 20 degree normal pressure angle. The gears have a diametral pitch of 10 and possess 15 and 45 teeth, respectively. Determin
A 25 degree full-depth spur gear with 45 teeth has an addendum of 1/3 in. What is the minimum number of teeth the pinion may have without interference occuring?
A long slab is heated to 100oC on both sides and then exposed to a focused stream of cold air on the top edge - giving an approximately sinusoidal temperature distribution.
A hydraulic jump at the base of a spillway of a dam is such that the depths upstream and downstream of the jump are .90 and 3.6m, respectively.
Determie a) if the quality of the mixture is initially at 50 percent,claculate the total mass of the mixture and the mass of the vapor and liquid, b) find the final temperature,after heat transfer.
If the air around the thermocouple is at 20oC and the walls are at 100oC, what temperature will the thermocouple read?
A geothermal power plant uses geothermal water extracted at 160oC at a rate of 440 kg/s as the heat source and produces 22 MW of net power. IF enviroment temp if 25oC determince the maximum thermal
You are an engineer in an electric-generation station. You know that flames in the boiler reach a temp of 1200 K and that cooling water at 300 K is available from a nearby river. What is the max ef
Liquid water enters a 25-kw pump at 100-kpa pressure at a rate of 5 kg/s. Determine the highest pressure the liquid water can have at the exit of the pump.
You measured the surface heater temperature to be 120oC. What is the average convective heat transfer coefficient? What do you mean by lumped capacitance?
A shaft with a diameter of 100 mm rotates at 1500 rpm. A fluid-film bearing is designed to support a 5 kN load. Assume the bearing's L/D ratio is 0.5, and the clearance is 0.5 mil.
If the convective heat transfer coefficient is 13.5 W/ m2K, estimate when the beverage will have a temperature of 15degreeC in mins.
A water cooler for drinking water should cool 1 ft^3/h from 65 F to 50 F using a small refrigeration unit with at COP of 2.5. Find the rate of cooling required and the power input to the unit.
Using the method of AGMA, calculate the maximum power that can be transmitted based upon the allowable bending fatigue strength, SF = 525 MPa using design factor of 2.
Air flows steadily at rate of 0.4kg/s through an air compressor, entering at 6m/s with a pressure of 1 bar and specific volume of 0.85m3/kg, leaving with 4.5m/s with a pressure of 6.9 bar, and speci
A highway patrol officer on the ground uses a radar gun to measure the speed of a suspect's car to be 60 m/s. Calculate the relative velocity of the suspects car and the patrol car.
Air enters a compressor operating at steady state with a volumetric flow rate of 8 m3/min at 23°C and 0.12 MPa. The air is compressed isothermally without internal irreversibilities, exiting at
Also what wind speed can tip off this pole if we consider the wind is maximum at the top of the pole.Consider the total weight to be 100lb.