Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change?

Methyl alcohal
Carbon-tetrachloride
Mercury
Water

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Process Control and Instrumentation
The Laplace transform of exp(at), where a > 0, is defined only for the Laplace parameter, s > a since

The Laplace transform of integral of exp(at) has finite values only for s > a
The function is exponential
The Laplace transform integral of exp(at) has initial values only for s > a
The function exp(at) is piece-wise continuous only for s > a

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