A chromatographer fed up with waiting 36 minutes to accomplish a separation requiring 8000 plates, packs a new column to reduce separation time. She slashed the particle diameter by a factor of 3. She adjusted the flow rate to work at the same reduced velocity as before ( the h versus v curves for the two columns are the same) and chooses a column length to get the same number of plates. Comparing the new column to the old, by what factor will the following parameters change: a) plate height b) column length c) flow velocity d) pressure drop e) separation time? What is the new separation time?

A chromatographer fed up with waiting 36 minutes to accomplish a separation requiring 8000 plates, packs a new column to reduce separation time. She slashed the particle diameter by a factor of 3. She adjusted the flow rate to work at the same reduced velocity as before ( the h versus v curves for the two columns are the same) and chooses a column length to get the same number of plates. Comparing the new column to the old, by what factor will the following parameters change: a) plate height b) column length c) flow velocity d) pressure drop e) separation time? What is the new separation time?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Consider a single screw melt extruder with the following dimensions: D = 6.0 cm, L = 60.0 cm, H = 0.6 cm, W = 6.0 cm & helix angle of 17.4°. The capacity at open discharge is 10 kg/hour and the viscosity of the polymer melt is 500 Ns/m?. a. Determine the pressure when Q = 5 kg/hr. b. Determine the pressure when a round die of diameter 3.00 cm and length 10.0 cm is attached to the extruder.
Liquid capacity of a separator is 3250 bpd and the retention time is 120 seconds. Calculate the liquid volume.
Based on the table below, which of the statements below is/are correct regarding the 3D printing process shown in the schematic? a.You can produce a room-temperature non-fragile 225C oven-safe food container with at least one material from the above table using this process and a 280C nozzle b.You can use this process to print plastic or brittle objects but not elastomers and rubbers c.Manufacturing a thermoplastic HDPE hose with an extrusion nozzle heated to 175C is possible with this process d.You can print thermoplastic and thermoset polymers with this process, you only need to make sure that the nozzle specs and the crosslinking conditions match the polymer requirements e.This process is best suited for the low volume production of tubes, bars and beams due to the nature of the extrusion process
A siilicon boule has been processed through grinding to provide a cylinder whose diameter = 281 mm and whose length = 899 mm. Next, it will be sliced into wafers 0.8 mm thick using a cut-off saw with a kerf = 0.5 mm. The wafer thus produced will be used to fabricate as many IC chips as possible for the personal computer market. Each IC has a market value to the company of $108. Each chip is square with 17 mm on a side. The processable area of each wafer is defined by a diameter = 265 mm. Estimate the value of all of the IC chips that could be produced (in $), asssuming an overall yield of 84% good product.
Using circles, draw regular two-dimensional arrangements that demonstrate low packing efficiency and high packing efficiency. asap please.
A prototype of a tube with a square cross-section is to be fabricated using stereolithography. The outside dimension of the square = 100 mm and the inside dimension = 90 mm (wall thickness = 5 mm except at corners). The height of the tube (z-direction) = 80 mm. Layer thickness = 0.1 mm. The diameter of the laser beam (“spot size”) = 0.25 mm, and the beam is moved across the surface of the photopolymer at a velocity of 500 mm/s. Compute an estimate for the time required to build the part, if 10 s are lost each layer to lower the height of the platform that holds the part. Neglect the time for post-curing.
Calculate to the correct number of significant figures. (9443+45-9.9)x8.1x10^6
Alplas Plastics uses an extruder in which the barrel diameter = 0.4 m and length = 6.0 m. The extruder screw rotates at 65 rev/min; it has channel depth = 0.02 m and flight angle = 16°. The plastic melt has a shear viscosity = 85 Pa-s. Determine: (a) Qmax and pmax; (b) the shape factor Ks for a circular die opening in which Dd = 0.009 m and Ld = 0.03 m; and (c) the values of Q and p at the operating point
Consider a single screw melt extruder with the following dimensions: D = 6.0 cm, L = 60.0 cm, H = 0.6 cm, W = 6.0 cm & helix angle of 17.4º. The capacity at open discharge is 10 kg/hour and the viscosity of the polymer melt is 500 Ns/m?. a. Determine the pressure when Q = 5 kg/hr. b. Determine the pressure when a round die of diameter 3.00 cm and length 10.0 cm is attached to the extruder.
Based on the table below, which of the statements below is/are correct regarding the 3D printing process shown in the schematic? Z AXIS X AXIS YAXIS LEGEND A: Extruder B: Nozzle C: Printed part D: Hot plate E: Filament Table 15.2 Melting and Glass Transition Temperatures for Some of the More Common Polymeric Materials Material Polyethylene (low density) Polytetrafluoroethylene Polyethylene (high density) Polypropylene Nylon 6,6 Polyester (PET) Poly(vinyl chloride) Polystyrene Polycarbonate Glass Transition Temperature [°C (°F)] -110 (-165) -97 (-140) -90 (-130) -18 (0) 57 (135) 69 (155) 87 (190) 100 (212) 150 (300) Melting Temperature [°C (°F)] 115 (240) 327 (620) 137 (279) 175 (347) 265 (510) 265 (510) 212 (415) 240 (465) 265 (510) a. This process is best suited for the low volume production of tubes, bars and beams due to the nature of the extrusion process b. Manufacturing a thermoplastic HDPE hose with an extrusion nozzle heated to 175C is possible with this process □c. You can…
Compute individual percent retained, cumulative percent retained and percent passing. Make a particle size distribution chart using semi log using excel. Compute the fineness modulus of the sample. Identify whether weight percent within the governing specs passed.
How can machinery parts and pipeline welds be tested for flies without destroying them? name several processes?