World Metrology Day | Measuring body temperature, the most accurate measurement is from the anus
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May 20th is World Metrology Day. Dongdong Miao will show you how to use a mercury thermometer correctly. 01 Why is the upper limit of the thermometer 42°C? The maximum "self-heating" that humans can withstand is 44°C. Exceeding 42°C may cause permanent brain damage. 02 Why does a thermometer use mercury? The volume of mercury can change stably with temperature, has good thermal conductivity, accurate data, and is cheap. 03 Shake the mercury thermometer before use The diameter of the bottom end is very thin, so that the liquid column can be disconnected when it drops, and the reading will not drop after the thermometer leaves the human body. 04 Inserting the anus to measure temperature is the most accurate The temperature under the armpit is affected by the thickness of fat, the temperature in the mouth is affected by the temperature of food, and the temperature measured in the rectum is relatively the most accurate. 05 What should I do if a mercury thermometer is broken? Open doors and windows first to keep ventilation and dry. You can collect and seal with paper. If there are symptoms of poisoning, go to hospital for treatment immediately. Produced by: Dongdongmeow WeChat ID: Dongdongmeow (ID: dongdongmeow) Video account: Dongdongmiao, Weibo: @Dongdongmiao Science Popularization |
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