Suppose an airline policy states that all baggage must be box shaped with a sum of length, width, and height not exceeding 132 in. what are the dimensions and volume of a square-based box with the greatest volume under these conditions? write a function for the volume v of the box in terms of w, one of the edges of the square bottom.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

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?