Suppose that you had a bag containing the following instrumental components: one PMT, one piece of metal foil, one HCL, a large quantity of an unknown aqueous sample, one nebulizer/atomizer/flame burner with fuel, one monochromator, one SDD, and one X-ray tube. Construct two block diagrams for each of the two separate spectrometers that you could buildfrom those parts. For each part of the block diagrams, list the specific component from the bag that is appropriate for that part (e. g. for the Source list an appropriate type of source) Draw theinstrumental output in the box and label the axes.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?