![]() For example, it can be used to measure water salinity in-class experiments and get rough estimates of milk fat content since density correlates to how much fat is present in a specific volume of milk. This device is used to measure the densities of various liquids and has other applications in different fields. The basis for all other densities of liquids is water, so when you use it in water, it should hit the 1.000 mark, proving true the specific gravity of water at 4☌. The meter will float lower in liquids with low density and higher in those with high density. You can see on the printed lines and numbers where the water level matches. To take the measurement, it needs to be submerged in the liquid until it floats. It is a thin glass rod with a round bulb at the tip to support and float upright. You can make a makeshift version of it using just plastic straws. #WATER DENSITY HOW TO#How to measure the densityĪ device for measuring the density of liquids is called the hydrometer, usually made of glass and resembles a thermometer. As a result, the ice formed from that kind of water is denser than ice from regular water. This type of water is 10.6% denser than regular water and has a chemical of D2O instead of the usual H2O since deuterium (an isotope of hydrogen) atoms have replaced the original hydrogen. However, there are special cases where the ice is of a slightly different composition, usually called “heavy ice” made from heavy water. We have already established that ice floats because it is less dense than liquid water. ![]() The heavy ice cubes sink to the bottom of the glass, and the lighter ice cubes float to the water surface.Ĭredit: Mike Walker Does heavy ice float? There is more ocean water content than freshwater, making the former denser. So the second time they asked me, I looked for ways to make my job easier.Ī good comparison would be ocean water and pure water. A gallon of tap water at that temperature was a lot for me to carry. I was a kid back then and weighed only 70 pounds. Then they asked me to return home, get a gallon of water and bring it to them to quench their thirst. It was a hot summer day, and they went up this nearby hill to bury their collection of bottle caps. There was a time in my life when I could use this concept of water density to get back at my older brother and his friends for always picking on me. One example that can be made for this is molten silica. ![]() This phenomenon is usually referred to as ‘negative thermal expansion’ and applies to those bonded with intermolecular forces and other chemical composition factors.
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