Def print ruler(in) This function is given a positive integer n, and prints a vertical ruler of 2! − 1 lines. Each line contains ‘-‘ marks as follows: • The line in the middle (! " ) of the ruler contains n ‘-‘ marks • The lines at the middle of each half (! # and $ # ) of the ruler contains (n-1) ‘-‘ marks • The lines at the ! % , $ % , & % and ' % of the ruler contains (n-2) ‘-‘ marks • And so on … • The lines at the ! "(, $ "(, & "(, ..., "()! "( of the ruler contains 1 ‘-‘ mark

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

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.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false