John wants to construct a device using quartz crystal, which device can he construct?
a.
a laser micrometer
b.
an analytical balance
a charge-coupled device
o d.
a piezoelectric pressure gauge
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An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

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

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