EC MasteringPhysics: Homew. x A Certain Copper Wire Has x ce a search https://se

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EC MasteringPhysics: Homew. x A Certain Copper Wire Has x ce a search https://session masteringphysics.com next&assignmentProblemID; 76978864 33% PHYS 203 Spring 2017 Jenkins Help Close Homework 3 tem 7 Resources previous l 7 of 21 l next Item 7 Part A A certain copper wire has a resistance of 13.0 2 At what point along its length must the wire be cut so that the resistance of one piece is 2.0 times the resistance of the other? Express your answer using two significant figures. 8.7 of the length of the wire. Submit My Answers Give Up incorrect; Try Again; 5 attempts remaining Part B What is the resistance of each piece? Express your answer using two significant figures.

Explanation / Answer

Part A

Resistance is proportional to length
So, cut it at 1/3 from either end. You will have a piece 1/3 long and another 2/3 long.

Part B
Actual resistances are 13/3 ohms and 26/3 ohms, or ohms 4.34 and 8.67 ohms.

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