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A 4.0 cm diameter sphere is heated to a temperature of 200 C & is enclosed in a large room at 20 C. Calculate the radiant heat loss if the surface emissivity is 0.6.
A long rectangular bar 20 mm wide and 10 mm thick made of hot-rolled 4340 carbon steel (Sy = 860 MPa, K1c = 99 MPaÖm), is found to have a centrically located through-thickness crack 8mm wide. Is it best to a) leave the crack alone, b) drill a 5 mm di..
a heat pump with refrigerant-134a as the working fluid is used to keep a space at 25degc by absorbing heat from
a piston - cylinder device initially contains 0.1 m3 of nitrogen gas at 150 kpa and 130 degc. the nitrogen is now
derive shear modulus g or bulk modulus k of isotropic materials in terms of youngs modulus e and poissons ratio v. use
a gas station uses a 0.05 m3 tank to store air at 800 kpa absolute and 15c. the tank is equipped with a valve through
a piston cylinder device initially contains 0.5 kg of r134a at 200 kpa and a specfic volume of 0.07 m3kg. at this point
a coal-fired power plant uses a large lake for its cooling needs. the power plant output is 300.0 mw. if the plant uses
Estimate the mass flow rate of fuel into the engine in kg/h.
water at 50 degrees farheneit and 50 psia is heated in a chamber by mixing it with saturated water vapor at 50 psia. if
a 0.2 m3 tank containing helium at bar and 22 c will be used to supply 4.5 moles per minute of helium at atmospheric
water at a rate of 45500 kghr is heated from 80 c to 150c in a shell-and-tube heat exchanger haveing two passes and
a fire hose nozzle has a diameter of 1.500 in. according to some fire codes the nozzle must be capable of delivering at
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