VAPOUR IN AIR DIFFUSION APPARATUS, SOLID IN AIR, DIFFUSION APPARATUS, ABSORPTION PACKED BED, ADSORPTION STUDY IN PACKED BED SOLID LIQUID SYSTEM, LIQUID LIQUID EXTRACTION IN PACKED BED, DETERMINATION OF VISCOCITY IN LAMINAR AND, TURBULANT FLOW, REYNOLDS APPARATUS, BERNOULLIS, THEOREM VERIFICATION APPARATUS, Determination of, Velocity Profile Using Pitot Tube, HEAT TRANSFER, THROUGH COMPOSITE WALLS APPARATUS, HEAT, TRANSFER FROM PIN FIN APPARATUS, THROUGH NATURAL CONVECTION, SHELL AND TUBE HEAT, EXCHANGER STEAM TO WATER