Engineering, 21.08.2019 21:30 rafa53
Consider an aluminum plate that is insulated on all sides except the top. the exposed plate area is 4m2 with 2m in length and 2m in width, and kept at a constant surface temperature of 350c by a heater placed inside the plate. the plate has an emissivity of 0.6 and an absorptivity of 0.4. if the sun is shining with irradiance hitting the plate of 800 w/m2, and air at 25c is blowing over the plate with a heat transfer coefficient of 150 w/m2, what is the overall heat transfer rate (in watts) from the plate?
Answers: 2
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
Engineering, 04.07.2019 18:10
A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.
Answers: 2
Engineering, 04.07.2019 18:10
The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m
Answers: 2
Engineering, 04.07.2019 18:10
Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery
Answers: 2
Consider an aluminum plate that is insulated on all sides except the top. the exposed plate area is...
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