Question

The instrument used to measure temperature i
$A.$ Protractor
$B.$ Stethoscope
$C.$ Thermometer
$D.$ None of these

Answer 1

Hint:A Thermometer is a device that measures temperature. Mercury is used in thermometers because it has a high coefficient of expansion. The modern thermometer was invented by Daniel Fahrenheit $1709$.

Complete step by step answer:
A thermometer can measure the temperature of a solid, liquid, or gas. In the human body, the temperature can be measured in the mouth, the ear, the rectum, and the armpit. A Non- contact thermometer is used to measure the body temperature from the forehead. Armpit temperatures are the least accurate. For infants, rectal temperatures give good results.

A measure of the average kinetic energy of the particles in an object is called temperature. The instrument used to measure temperature is a thermometer. Thermometers show body temperature in either degree Fahrenheit \[(^\circ F)\] or degrees Celsius \[(^\circ C)\].

Operation of thermometer: A thermometer has two important elements. They are $(1)$ a temperature sensor and $(2)$some means of converting change into a numerical value. The thermometer is based on the principle of thermal expansion. It expands to a greater volume when a substance gets hotter and it contradicts when a substance gets cooled. Likewise, as the temperature around the bulb of the thermometer heats up, the liquid rises in the glass tube. When it is hot, the liquid will expand and rise in the tube. digital thermometer, Tympanic thermometer, Infrared thermometer, Strip-type thermometer, Mercury thermometer. These are the types of thermometer. Thermometers are used to measure the rate of heat flow in the heat meter.

Note:The main purpose of thermometers in the industry is to monitor processes, in meteorology, medicine, and scientific research. There are several applications of the thermometer. They are Air conditioning system, in laboratories and storage rooms, for detecting hidden problems, Food preparation services, Transport, and automotive spot checks, etc.,