MasteringPhysics: week 7-Google Chrome @ https://session.masteringphysics.com/my

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MasteringPhysics: week 7-Google Chrome @ https://session.masteringphysics.com/myct/itemView?assignmentProblemID SCI215DONELSON16 week 7Problem 14.10 61706462 Signed in as Help Close Resources « previous| 3 of 12 next » Problem 14.10 A steel bar and a copper bar have the same length of 1.400 m at-12.00 °C Part A What is the difference in the lengths of the two bars at 44.0 °C? Express your answer in millimeters to three significant figures Submit My Answers Give Up Incorrect, Iry Again, 3 attempts remaining Continue I'm Cortana. Ask me anything 5:22 PM 5/25/2016

Explanation / Answer

given

1400 = L1 ( 1+ alpha(copr)x -56)

L1 = 1401.33407 m

and

1400 = L2( 1+ alpha(stl)x -56 )

L2 = 1401.019943 m

L1-L2 = 0.31412 m

L1-L2 = 314.12 mm ( try -314.12 also )

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