The following equation is used to calculate the heat transfer Q in a boiler given the surface area A, the overall heat transfer coefficient U, the heating fluid inlet temperature T1, the heating fluid exit temperature T2, and the temperature of the boiling fluid Ts. Let T1 = 600 o F, Ts = 535 o F, and Q/(UA) = 34.1 o F. a. Show that a root exists between T2 = 536 o F and T2 = 580 o F. (Do not find the actual root yet.) b. Write a MATLAB program

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?

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false