Physics, 11.09.2019 05:10 TexaSuperdude
Acomputer hard drive has a disc that rotates at 10,000 rpm. the reader head is positioned 0.0005 in. above the disc’s surface. estimate the shear force on the reader head due to the air between the disc and head.
Answers: 2
![A = \frac{\pi}{4} d^2 = \frac{\pi}{4} [\frac{0.2}{12}]^2 = 2.18\times 10^{-4} ft^2](/tpl/images/0227/6197/92435.png)
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Acomputer hard drive has a disc that rotates at 10,000 rpm. the reader head is positioned 0.0005 in....
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