The percentage of nitrogen in Urea is _____________%
What refers to a shape achieved by allowing a liquid
to solidify in a mold.
The percentage of nitrogen in ammonium sulphate is__________%
What refer to the casehardening process by which the carbon content of
the steel ear the surface of a part is increased?
The special chrome steels of the stainless variety
contain how many percent of chromium.
What refers to the deterioration of material by oscillatory relative
motion of small amplitude between two solid surfaces in a corrosive
environment?
