A28-tooth pinion is to drive a 60-tooth gear. given a diametral pitch (pd) of 8 and a pressure angle of 14.5°, find the contact ratio for the set meshing gears. how does this ratio compare to the recommended contact ratio?

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure

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.