Engineering, 29.10.2019 05:31 yasarhan2
Acartridge electrical heater is shaped as a cylinder of length l=200 mm and outer diameter d=20 mm. under normal operating conditions the heater dissipates 2 kw while submerged in a water flow that is at 20c and provides a convection heat transfer coefficient of h=5000 w/mk. neglecting heat transfer from the ends of the heater, determine its surface temperature ts. if the water flow is inadvertently terminated while the heater continues to operate, the heater surface is ex posed to air that is also at 20c but for which h=50 w/m k. what is the corresponding surface temperature? what are the consequences of such an event?
Answers: 3
Engineering, 04.07.2019 19:10
Asteel wire of 2 mm diameter is fixed between two points located 2 m apart. the tensile force in the wire is 250n, if its density of steel is given by 7830 kg/m3 the fundamental frequency of vibration hz? ?
Answers: 3
Engineering, 04.07.2019 19:10
Analyze the factors that influence the choice between the following pairs of processes to make the products indicated: i) sand casting versus die casting of an electric-motor housing ii) thread rolling versus machining of a bolt for high-strength application. (co3/c5)
Answers: 3
Engineering, 04.07.2019 19:20
To design a steam turbine to produce 12,000 hp power. a engineer comsiders using a steady state stean low st 1160fr and engineer considers using a steady state steam flow at 1160°r and 450 psia to drive this steam turbine. the exhaust of the steam is cooled by the lake (vacuum). heat losing to the surroundings is measured at a rate of 555.55 btu/s. (a) sketch the system with the given conditions. (b) neglecting kinetic and potential energy changes from inlet to exit, determine the volumetric flow rate of the steam at the inlet, (ft'/hr). must clearly show unit conversions at crtical terms.
Answers: 1
Engineering, 04.07.2019 19:20
Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volurge for a gas is much higher than the average volume for a liquid. d)-there is no difference
Answers: 3
Acartridge electrical heater is shaped as a cylinder of length l=200 mm and outer diameter d=20 mm....
Health, 06.11.2019 06:31
Mathematics, 06.11.2019 06:31
Mathematics, 06.11.2019 06:31
Social Studies, 06.11.2019 06:31
Chemistry, 06.11.2019 06:31
Chemistry, 06.11.2019 06:31
English, 06.11.2019 06:31