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Galileo Thermometer Triangle Natural Finish
Item #:
TRIGALILEONATURAL
In Store Availability: In Stock
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Retail: $49.99
Price: $38.99
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Galileo thermometer is a perfect fusion of science and art. This Galileo thermometer is encased within a triangle wooden frame. Each gold tag attached to a floating globe indicates a temperature and the top globe indicates the current temperate.
As the liquid changes temperature, it changes density and the suspended weights rise and fall to stay at the position where their density is equal to that of the surrounding liquid forming a temperature scale.
Features:
- 15 inches tall
- 6.5 inch wide base on all three sides
- 7 Multi-colored globes
- 60-84 degree temperature range
- Natural finish
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The temperature is typically read from an engraved metal disc on each weight. The lowest weight of the top set of weights indicates the ambient temperature. To achieve this requires manufacturing the weights to a tolerance of less than 1/1000 of a gram
The Galileo thermometer works due to the principle of buoyancy. Buoyancy determines whether objects float or sink in a liquid, and is responsible for the fact that even boats made of steel can float (of course, a solid bar of steel by itself will sink).
The only factor that determines whether an object will float or sink in a particular liquid relates the object's mass to the mass of the liquid displaced by the object when submerged. If the object's mass is greater than the mass of liquid displaced, the object will sink. If the object's mass is less than the mass of liquid displaced, the object will float..
In the Galileo thermometer, the small glass bulbs are partly filled with a different (colored) liquid. Each is filled with a slightly different amount, ranging from lightest at the uppermost bulb to heaviest at the lowermost bulb. The clear liquid in which the bulbs are submerged is not water, but some inert hydrocarbon (chosen because its density varies with temperature more than water does).