Which of the following thermometers is used to measure the temperature of the human body?
- Thermocouple
-
Alcohol-in-glass thermometer
- Gas thermometer
- Platinum resistance thermometer
The correct answer is: B
Explanation
The range of usefulness of the thermometer is set by the boiling point of the liquid used. In the case of the ethanol-filled thermometer, the upper limit for measurement is 78 °C (172.4 °F), which makes it useful for measuring daytime, nighttime and body temperatures, although not for anything much hotter than these.