Engineering, 11.07.2019 03:30 thulani2
Atmospheric air is in parallel flow (u=10 m/s, to= 15°c) over a flat heater surface that is to be maintained at a temperature of 90°c. the heater surface area is 0.25 m^2, and the airflow is known to induce a drag forde of 0.15 n on the heater. what is the electrical power needed to maintain the prescribed surface temperature?
Answers: 3
Engineering, 03.07.2019 14:10
Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
Answers: 1
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
The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length
Answers: 2
Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
Atmospheric air is in parallel flow (u=10 m/s, to= 15°c) over a flat heater surface that is to be ma...
Biology, 29.05.2020 00:57
Biology, 29.05.2020 00:57
History, 29.05.2020 00:57
Mathematics, 29.05.2020 00:57
Computers and Technology, 29.05.2020 00:57
Health, 29.05.2020 00:57
Biology, 29.05.2020 00:57
History, 29.05.2020 00:57
Mathematics, 29.05.2020 00:57
Mathematics, 29.05.2020 00:57
Mathematics, 29.05.2020 00:57