A sheathed thermocouple with a time constant of 4.0 seconds is initially at a room temperature of 20C. It is then plunged into a beaker of boiling water at 100C. Assuming that the thermocouple has a...

A sheathed thermocouple with a time constant of 4.0 seconds is initially at a room

temperature of 20C. It is then plunged into a beaker of boiling water at 100C.

Assuming that the thermocouple has a first-order characteristic, what temperature

would it indicate when it had been in the water for 8.0 seconds?