A motor whose pulley is 80mm in diameter is rotating at 300 revolutions per minute and is connected by a belt to another pulley of 40mm diameter, calculate the rotating speed of the smaller pulley

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

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

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.