A. your program should start with a statement in comments at the top: "as a team, we have gone through all required sections of the tutorial, and each team member understands the material." b. creates 4 matrices, a, b, c, and d, of size 3x4, 4x2, 2x3, and 3x1. you can use randomized or hardcode values for the entries. output each of these matrices. c. computes the product e = abc and outputs the resulting matrix. (note: this is matrix multiplication not simple elementwise multiplication.) d. prints the transpose of e. e. solves the linear system ex=d for x (this is the solve command). print x

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

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?

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.