Consider the problem of constructing (not solving) crossword puzzles:5 fitting words into a rectangular grid. The grid, which is given as part of the problem, specifies which
squares are blank and which are shaded. Assume that a list of words (i. e., a dictionary) is
provided and that the task is to fill in the blank squares using any subset of the list. Formulate
this problem precisely in two ways:
a. As a general search problem. Choose an appropriate search algorithm, and specify a
heuristic function, if you think one is needed. Is it better to fill in blanks one letter at a
time or one word at a time?

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

On a average work day more than work place firs are reorted

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?