An angle bracket is bent in a v-bending operation on a press brake from a flat blank that is 4.0 in long by 1.5 in wide by 5/32 in thick. the 90bend is made in the middle of the 4-in length, so that the bend axis is 1.5 inlong.

(a) determine the dimensions of the two equal sides that will result after the bend, if the bend radius = 3/16 in. the sides should be measured to the beginning of the bend radius.

(b) also, determine the length of the two equal sides assuming the sheet metal did not stretch.

What precautions should you take to prevent injuries when dealing with heavy loads?

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?

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.