Question

9:30 (Class #1152)-Boleware Hi, JeremySign Out < 230136( Part G Consider a steel guitar string of intial length L-1.00 meter and cross-sectional area A-0.500square millimeters The Young's modulus of the steel is Y-2.0 x10lipascas. How far (Δ1 ) would such a string stretch under a tension of 1500 newtons? Use two significant figures in your answer. Express your answer in millimeters. Δ1: 15 mm Answer Requested Steel is a very strong material For these numeric values, you may assume that Hooke's law holds However, for greater values of tensile strain, the material no longer behaves elastically If the strain and stress are large enough, the material deteriorates The final part of this problem ilustrates this point and gives you a sense of the "stretching imit" of steel Part H Although human beings have been able to fly hundreds of thousands of miles into outer space, getting inside the earth has proven much more difficult. The deepest mines ever driled are only about 10 miles deep To Mustrate the difficultes associated with such driling, consider the following The density of steel is about 7900 kilograms per cubic meter, and its breaking stress, defined as the maximum stress the material can bear without deteriorating is about 2.0 x 10° pascals What is the maximum length of a steel cable that can be lowered into a mine? Assume that the magntude of the acceleration to gravity remains constant at 9 8 meters per second per second Use two significant figures in your answer, expressed in kilometers. 352 AM ^匍刪1/28/2019

Answer 1