Question

8. [-14 Points] DETAILS SERPSE10 30.1.OP.008.CTX. MY NOTES ASK YOUR TEACHER You are a technician at an MRI center. One day some medical students enter your lab for a training session. One of them asks about metal in the MRI room, and you clearly state that that is a dangerous situation. The questioner does not look convinced, so you provide the following example. Suppose a woman enters the MRI machine and has forgotten to remove a silver choker necklace. The necklace can be modeled as a ring of radius 8.50 cm. The cross section of the necklace is a rectangle of width 1.40 cm and thickness 0.500 cm. As the woman lies in the machine, the plane of the necklace is perpendicular to the magnetic field lines in the machine. Suddenly, there is a power failure, and the magnetic field in the MRI machine drops from 3.00 T to zero in 15.0 ms. To make the point to the students, determine the temperature change (in K) by which the necklace around the woman's neck rises. (Use any values in this table, this table, or this table). K Need Help? Read It

Answer 1

Пас. Саме пие.lace R= SL А Arua = ( 1 ) ( ) - ум o. 110 2. п/ - 2 п. ) 0.34 Р - 1. 9 х 10 2 0.39 1.59 x 10-8 0.1 x to -9 1. 2 13 Хоч in емс generated necklace рих dt Area of necklace a T/8. = 0, 022 4 - 2. 3 - 0 ir Yio-3 ) to. 0 ал. 3) 4.54 roles

3 Density of Lilvera 10ч/ Nolume 0.1 yto-4 х 10, 39 о. 37 38 10 -4 м 2 ЧАЈ ЛИe la u = fu І ось x 0. 373xto-9 О. 342 - ng £2 R 15 ms Power sistipated in neck lace 79. г) Т. 2 (3 х 10 -9 17x104 w Energy Distipated in = taxtox txto-3 2550 joules Specific Heat of silver = 234 23ч та с м са 2 Уго 2 О. 392 к 23 х ДТ ΔΤ - 24. 16 К
formula was used.