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View History Bookmarks Window Help WeeyPLUS Q Search Done l Contact Us I Log Out PHYS PRI OF NANO SCIENCE 1 (NENG126) wileyPLUS: MywileyPLUSI Halliday, Fundamentals of Physics, 10e ractice Assignment Gradebook ORION Downloadable eTextbook gnment MESSAGE MY INSTRUCTOR ruLL SCREEN PRINTER VERSION BACK NEXT Chapter 10, Problem 024 Your answer is partially correct. Try again A vinyl record is played by rotating the record so that an approximately circular groove in the vinyl slides under a stylus. Bumps in the groove run into the stylus, causing it to oscilliate. The equipment converts those oscillations to electrical signals and then to sound. Suppose that a record turns at the rate of 33 rev/min, the groove being played is at a radius of 11.9 cm, and the bumps in the groove are uniformly separated by 0.491 mm. At what rate (hits per second) do the bumps hit the stylus? 2714.956614 hits/s the tolerance is +/-2% LINK TO SAMPLE PROBLEM VIDEO MENE LECTURE By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your Question Attempts: 1 of 5 used SAVE FOR LATER SUBHIT ANSWER Earn Maximum Points available only you answer this question correctly in three attempts or less udy

Explanation / Answer

given that w = 33*1/3 = 100/3 = 33.33 rev /min

radius is r = 0.119 m

circumference is 2*pi*r = 2*3.142*0.119 = 0.75 m

spacing is d = 0.491 mm

No.of bumps in the groove is 0.75/(0.491*10^-3) = 1527.5

then required hits per second is 33.33*1527/60 = 848.24 hits/sec

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