Engineering, 11.06.2020 16:57 goldenhawk239
Which of the following factors used in a dimensional analysis calculation have a finite number of significant figures that could determine the precision of the calculated value?
1. A conversion factor for time of (60 min/1 hour)
2. A conversion factor for distance of (1000 m/1 km)
3. A measurement of speed equaling (27.7 km/hour)
4. None of the above
Answers: 3
Engineering, 04.07.2019 18:10
Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?
Answers: 2
Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
Answers: 3
Engineering, 04.07.2019 18:20
Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.
Answers: 3
Engineering, 04.07.2019 18:20
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
Which of the following factors used in a dimensional analysis calculation have a finite number of si...
Chemistry, 29.06.2019 10:30
History, 29.06.2019 10:30
Social Studies, 29.06.2019 10:30
Chemistry, 29.06.2019 10:30
Social Studies, 29.06.2019 10:30
Health, 29.06.2019 10:30
Mathematics, 29.06.2019 10:30