Chemical Engineering > GATE 2014 > Process Dynamics
Assume that an ordinary mercury-in-glass thermometer follows first order dynamics with a time constant of 10 s. It is at a steady state temperature of 20°C. At t=0, the thermometer is suddenly immersed in a constant temperature bath of 95°C. The time (in s) for the thermometer to read 95°C, approximately is
Correct : b
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