Estimate the torque needed to rotate the disk

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Reference no: EM13885904

1. SAE-30 oil at 30-C fills the gap between a 40-cm-diameter flat disk rotating 0.16 cm above a flat surface.

Estimate the torque needed to rotate the disk at

(a) 200 rpm  

(b) 600 rpm  

(c) 1200 rpm

Reference no: EM13885904

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