A simple form of densitometer is used to measure the concentration of anti-freeze additive in automotive engine coolant. Aye, there’s the rub. As I type this, the label on my lowest floating bubble reads 24°C. All the labels on our Galileo thermometer are written in … Decorative as well as useful, the Galileo thermometer is based on an invention called the thermoscope invented by Galileo Galilei in the 1600s. 27/04/2010 The Galileo thermometer consists of a vertical glass tube, typically filled with water, and sealed glass bubbles containing coloured water or alcohol. Although most of us understand what density is, it is a bit harder to define in words. If you place it a fridge for about 15 minutes the balls should all be at the top (or at least some of them). It is quite accurate, but not very precise. The Galileo Thermometer may be a much more complex instrument, but it is based on the thermoscope that Galileo invented as a result of his theory. The Galileo thermometer tutorial begins with how to read a Galileo thermometer and how this type of thermomter works. The science or physics behind a Galileo thermometer … First try to wiggle the thermometer gently or tap on the glass, This will untangle them, It's also possible that the temperature is too warm where the thermometer is located. Meaning, with most Galileo thermometers, you will be able to read the temperature within 5 degrees. The label on the lowest bubble tells you the temperature. Each bubble is also attached to a specific mass (labelled with the temperature it represents) to calibrate its density (the amount of mass in a given volume). Is the Galileo thermometer accurate? The Galileo thermometer consists of a vertical glass tube, typically filled with water, and sealed glass bubbles containing coloured water or alcohol. Each bubble is also attached to a specific mass (labelled with the temperature it represents) to calibrate its density (the amount of mass in a given volume). As the ambient temperature rises, the glass balls will sink to the bottom of the thermometer. In this case, the indicated temperature is 72 o F. Explain the operating principle of this thermometer. To read a Galileo thermometer, look at the bubbles floating near the top of the tube. It somewhat resembles a Galileo thermometer, and it is read the same way (by seeing how many of the balls float):

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