In this example we see how thermal expansion can actually throw off theaccuracy of a length-measuring device-namely, a tape measure. Asurveyor uses a steel measuring tape that is exactly 50.000 m long at atemperature of 20 °C. What is its length on a hot summer day when thetemperature is 35 °C?SOLUTIONSET UP AND SOLVE We have Lo = 50.000 m. To(Note that because AL is usually much smaller than Lo, we needsteel is 1.2 x 10-5 K-¹. Using the same equation,The new length isPart A - Practice Problem:20 °C, and T 35 °C. We use the following equation to find AL:AL=aLo ATIVD ΑΣΦSubmitL = Lo + AL50.000 m -0.0090 m :50,009 mREFLECT The measuring tape lengthens by 9 mm, or 0.018%. In surveying a baseball field, this amount is negligible, but not when measuring the length of a steel bridge. Notethat, although Lo is given to five significant figures, we need only two of them to compute AL.Request Answerkeep more significant figures in the lengths than in the temperatures.) The coefficient of linear expansion forAL aLo ATA concrete slab forming part of a driveway is 40.000 m long when the temperature is 20 °C. How much does the driveway increase in length when the temperature increases to30 °C? The coefficient of linear expansion for concrete is 1.2 x 10-5 K-¹Express your answer in millimeters to two significant figures.?(1.2 x 105 K¹) (50 m) (35 °C9.0 x 10³ m9.0 mmmm20 °C)

Answered: Image /qna-images/answer/f16e98c8-5c84-44ed-a00e-aadd8eebdabc.jpg

art A- Practice Problem: A concrete slab forming part of a driveway is 40.000 m long when the temperature is 20 °C. How much does the driveway increase in length when the temperature increases to 30 °C? The coefficient of linear expansion for concrete is 1.2 x 10 K¹ Express your answer in millimeters to two significant figures.

art A- Practice Problem: A concrete slab forming part of a driveway is 40.000 m long when the temperature is 20 °C. How much does the driveway increase in length when the temperature increases to 30 °C? The coefficient of linear expansion for concrete is 1.2 x 10 K¹ Express your answer in millimeters to two significant figures.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter11: Energy In Thermal Processes

Section: Chapter Questions

Problem 40P: The thermal conductivities of human tissues vary greatly. Fat and skin have conductivities of about...

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