Introduction To Health Physics
Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 13, Problem 13.10P
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Question 5: An antibody suspension is applied through a tube at a flow rate of 9 lit/min. The mass diffusivity of the antibody in the suspension is 75 um?/s. The tube has an internal diameter of 1.5 cm and a length of 20 cm. 5a. Calculate Sherwood number 5b. Calculate Schmidt number 5c. Calculate the rate of antibody deposition across the internal surface of the tube Antibody solution Density = 1050 kg/m³ Viscosity = 2 mPa.s Concentration = 5 mM Internal diameter = 1.5 cm Length = 20 cm
27. A shielded vial with a 1-mm thick lead shield contains Tc. If A. 11.8 mR/hr В. 23.5 mR/hr C. 47 mR/hr D. 94 mR/hr the unshielded sample yielded an exposure rate of 188 mR/hr, what will the exposure rate be from the shielded vial? (The lead HVL for Tc is 0.25 mm.) 28. If "Co gives an exposure rate of 38 R/hr at 2 m, at least how А. 2 В. 3 many HVLS of concrete shielding are required to reduce this exposure to below 2 R/hr at the same distance? (The concrete HVL for "Co is 6.2 cm.) С. 4 D. 5
A GM counter has dead time of 250 s. It records 20.000 counts per minute. What is the actual count rate?
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