Engineering, 24.02.2020 03:32 kierafisher05
Explain why you chose the final design of your prototype and how it solved the identified need
Answers: 3
Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Engineering, 04.07.2019 18:10
Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
Answers: 3
Engineering, 04.07.2019 18:10
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
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
Explain why you chose the final design of your prototype and how it solved the identified need...
Spanish, 02.07.2019 18:00
Social Studies, 02.07.2019 18:00
Mathematics, 02.07.2019 18:00
Mathematics, 02.07.2019 18:00
Mathematics, 02.07.2019 18:00
Advanced Placement (AP), 02.07.2019 18:00
Mathematics, 02.07.2019 18:00
Biology, 02.07.2019 18:00
Mathematics, 02.07.2019 18:00
History, 02.07.2019 18:00
English, 02.07.2019 18:00
Mathematics, 02.07.2019 18:00
Mathematics, 02.07.2019 18:00
Mathematics, 02.07.2019 18:00