Estimate the torque needed to rotate the disk

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Reference no: EM131190094

1. A vacuum of 25 kPa is measured at a location where the elevation is 3000 m. What is the absolute pressure in millimeters of mercury?

2. A flat 30-cm-diameter disk is rotated at 800 rpm at a distance of 2 mm from a flat, stationary surface. If SAE-30 oil at 20°C fills the gap between the disk and the surface, estimate the torque needed to rotate the disk.

Reference no: EM131190094

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