Science, asked by katariyakusum7, 9 months ago

speech on thermometer ​

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Answered by mihirchavan01102005
1

Answer:

A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object). A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer) in which some change occurs with a change in temperature; and (2) some means of converting this change into a numerical value (e.g. the visible scale that is marked on a mercury-in-glass thermometer or the digital readout on an infrared model). Thermometers are widely used in technology and industry to monitor processes, in meteorology, in medicine, and in scientific research. During the COVID-19 pandemic they were used by businesses to detect the fever brought on by the virus. [2]

Some of the principles of the thermometer were known to Greek philosophers of two thousand years ago. The Italian physician Santorio Santorio (Sanctorius, 1561-1636)[3] is commonly credited with the invention of the first thermometer, but its standardisation was completed through the 17th and 18th centuries.[4][5][6]

History Edit

Main articles: Temperature and Temperature measurement

An infrared thermometer is a kind of pyrometer (bolometer).

While an individual thermometer is able to measure degrees of hotness, the readings on two thermometers cannot be compared unless they conform to an agreed scale. Today there is an absolute thermodynamic temperature scale. Internationally agreed temperature scales are designed to approximate this closely, based on fixed points and interpolating thermometers. The most recent official temperature scale is the International Temperature Scale of 1990. It extends from 0.65 K (−272.5 °C; −458.5 °F) to approximately 1,358 K (1,085 °C; 1,985 °F).

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Answered by sreenandhanaks7733
1

Answer:

Explanation:

''True love is measured by the thermometer of suffering.''

good morning one and all,venerable one on and off the dias.

Have u heard the word thermometer?

A thermometer is an instrument for measuring or showing temperature (how hot or cold something is). One type of thermometer is a narrow, concealed glass tube containing mercury or alcohol which extends along the tube as it expands. Another type is a digital thermometer, which uses electronics to measure temperature.

Early thermometers from the time of Galileo measured the expansion and contraction of air. After the middle 17th century many used alcohol or mercury. In the 19th century a mechanical thermometer was in invented that used a bimetallic strip to move a pointer. This kind is still popular where people like to read temperature from a distance.

Do you know about the first thermometer?

The first real medical thermometer was invented by Sir Thomas Allbut in 1867. It was six inches long and took about five minutes to take a person's temperature. For almost a hundred years thermometers were basically unchanged. They contained alcohol or mercury and were considered to be very accurate.

Depending on the context of utilization (hospital vs border), the volume of measurements to be done and the age of the person to be measured, it might be imperative to use infrared thermometers over more accurate and/or more invasive thermometers. Therefore, tympanic thermometers and thermal scanners might be the only effective and accurate tools to detect fever under certain circumstances. However, one has to keep in mind that screening for fever and screening for a virus are two different issues.

In conclusion, evidence retrieved from sixteen non-randomized studies and four systematic reviews is in favor of accuracy of tympanic thermometers and, more cautiously, of thermal scanners. Evidence for the accuracy of infrared skin thermometers is equivocal and requires more research. The generalizability of the evidence found is nevertheless uncertain.

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