C Chegg S MSN Arkansas State University X Guided S Math P C WWW sapling learning
ID: 1468162 • Letter: C
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C Chegg S MSN Arkansas State University X Guided S Math P C WWW sapling learning.com 2060915 /ibiscms/mod/ibis/view.php?id Sapling Learning Arkansas State University, N 2133 SUMMERS Homework 14: Chs. 31 & 32-Radioactivity and Nuclear Physics My Assignment 12/7/20 11:55 PM GA 669/100 G 11/19/2015 02:10 PM Gradebook Attempts Score Print Calculator Period Table Question 13 of 13 Calculate the effective radiation dosage (in Sieverts) for a 85-kg person who is exposed to 3.6 x108 particles of alpha radiation. Assume that 89% of the radiation is absorbed, each alpha particle has an energy of 6.8x10 3J, and that the RBE of the alpha particles is 15. Note that RBE is sometimes called the quality factor, abbreviated as Q O Previous Give Up & View solution 2 Check Answer ONext Exit Hint P Jump to Resources O Assignment Informati Available From: 8/24/2015 12:00 AM 12 /2015 11:55 PM Due Date: Late submissions: Allo points possible deducted per 12/14/2015 11:55 PM Grade Category: Homework Descripti Polici You can check your answers. You can view solutions when you complete or give up on any question. You can keep trying to answer each question until you get it right or give up You lose 5% of the points available to each answer in your question for each incorrect attempt at that O eTextbook OH p With This Topic o Web Help & Video O Technical Support and Bug Reports 5.45 PM /19/2015Explanation / Answer
Total no of alpha particles = 3.6 × 109.
Energy of one particle = 6.8 × 10–13 J
Total energy of 3.6 × 109.particles = 3.6 × 109. x 6.8 × 10–13 J = 2.448 x 10-3 J.
Energy absorbed = 89 % x 2.448 x 10-3 J = 2.18 x 10-3 J
Energy per unit mass, D = 2.18 x 10-3 J / 85 kg = 2.56 x 10-5 Gy
Effective dose = Q x D = 15 x 2.56 x 10-5 Gy = 0.385 x 10-3 Sv.
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