An unknown length of platinum wire 0.920 mm in diameter is placed as the unknown resistance in

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An unknown length of platinum wire 0.920 mm in diameter is placed as the unknown resistance in a Wheatstone bridge (see Problem 71; Fig. 19-61). Arms 1 and 2 have resistance of 38.0Ω and 46.0 Ω, respectively. Balance is achieved when R3 is 3.28 Ω. How long is the platinum wire?
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Materials Science and Engineering An Introduction

ISBN: 978-0470419977

8th edition

Authors: William D. Callister Jr., David G. Rethwisch

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