For the following questions answer them individually
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from $$0$$ to $$-150^\circ C$$ will
The defect responsible for the phenomenaofslip, by which most metals deform plastically, is known as
With a punch for which the maximum crushingstress is 4 times the maximum shearing stress of the plate, the biggest hole that can be punchedin the plate would be of diameter equal to