天堂向左dd向右
幼苗
共回答了20个问题采纳率:95% 举报
The thermometer is the earliest in 1593 by Italy scientist Galileo (1564 ~ 1642) invention. His first thermometer is a root is open glass tube, the other end is provided with a large walnut glass bulb. When using glass bulb heating to the first, and then put the glass tube is inserted into the water. Along with the change of the temperature, the surface will be in the glass tube to move up and down, according to the movement of the many will be able to determine the changes in temperature and temperature. Thermometer with thermal expansion and contraction of the role so that the thermometer, affected by the outside atmospheric pressure environment greatly, so the large measurement error. After Galileo's students and other scientists, repeated improvement on this basis, such as the glass tube upside down, the liquid in the pipe, the glass tube closed. The more prominent is the French Blio in the thermometer manufactured in 1659, he put the glass bubble volume is reduced, and the temperature of material instead of mercury, this thermometer has the embryonic form of thermometer now. After the Dutch Fahrenheit in 1709 the use of alcohol, in 1714 and again by using mercury as a measurement of material, made more accurate thermomete
1年前
4