Perspex is nothing but________?

Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at vena-contracta/area of opening), Cv = co-efficient of velocity = (actual velocity at vena-contracta/theoretical velocity)?

A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is________?

Which is the most suitable for the concentration of foamy & frothy liquors?

A coal with high ________ content, would ignite most easily?

Satellites burn off during re-entry to earth’s atmosphere, because of the ________?