glycerin at 20c fills the space between a hollow sleeve of diameter 12
Glycerin at 20°C fills the space between a hollow sleeve of diameter 12 cm and a fixed coaxial solid rod of diameter11.8 cm. The outer sleeve is rotated at 120 rev/min.Assuming no temperature change, estimate the torque required, in N m per meter of rod length, to hold the inner rod fixed.
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