Question

Why can't we design a laboratory thermometer with the kink so that we can record the temperature even after removing it out of the beaker?

Answer 1

These are the reason because of which we can not use clinical thermometer in laboratory purpose.

We can't use clinical thermometer as a laboratory thermometer because in clinical thermometer the metal which is used is called mercury but in laboratory thermometer alcohol is used which expands faster than the mercury. so in laboratory we need uniformity between the body and the thermometer's temperature to get the accurate reading. Lab thermometers are designed to measure immediate temperature so upon removing it from a beaker to read the temperature reading will change. Clinical thermometers are designed to read and hold the maximum temperature encountered. That's why one supposedly could fake a fever by holding the thermometer on a radiator until it read 105F so you could go to the hospital instead of school.