Overview of the origin of Galileo and Galileo thermometers.
Is a physicist Galileo Galilei, Italian mathematician, astronomer and philosopher who has a major role in the scientific revolution of the sixteenth century. He was the first to discover that the fluid density changes as a result of an increase or decrease in temperature.
Although he did not create the Galileo Thermometer, was named in his honor because without the invention it will be impossible to create it. This device has been manufactured since the late seventeenth century.
Thermometer which bears his name consists of a glass cylinder closed. Inside is a clear liquid and a series of glass balls. Each has a weight attached to it. Due to changes in temperature, they go up and down depending on the number of mathematical principles. However, Galileo thermometers have an aesthetic that transcends its function, namely a unique appearance when compared with ordinary thermometer thermometer reason enacting this be the reason how beautiful science.
Although he did not create the Galileo Thermometer, was named in his honor because without the invention it will be impossible to create it. This device has been manufactured since the late seventeenth century.
Thermometer which bears his name consists of a glass cylinder closed. Inside is a clear liquid and a series of glass balls. Each has a weight attached to it. Due to changes in temperature, they go up and down depending on the number of mathematical principles. However, Galileo thermometers have an aesthetic that transcends its function, namely a unique appearance when compared with ordinary thermometer thermometer reason enacting this be the reason how beautiful science.
How it works Galileo Thermometers
Galileo thermometer works in accordance with the principle of buoyancy. Determine whether objects float or sink in the liquid, and is responsible for the fact that even a boat made of steel can float (of course, a solid bar of steel by itself will sink). The only factor that determines whether a large object will rise or fall in a particular liquid relates the object density fluid density where it is placed. If the mass of the object is greater than the mass of liquid displaced, the object will sink. If the mass of the object is less than the mass of liquid displaced, the object will float.
Figure 2
Not all objects made of green material on top will sink. In Figure 2, the interior of the green objects were concave. The total mass of the object is now 0.5 kg, but the volume remains the same, so the float half way out of the water like a brown object in Figure 1.
In the example above, the liquid in which the object is assumed to have been floating the water. Water has a density of 1 kg / L, which means that the mass of water displaced by one object on top when fully submerged, is 1 kg.
Galileo found that the fluid density is a function of temperature. This is the key to how Galileo thermometer works, such as water temperature increases or decreases from 4oC, reduced density.
In the example above, the liquid in which the object is assumed to have been floating the water. Water has a density of 1 kg / L, which means that the mass of water displaced by one object on top when fully submerged, is 1 kg.
Galileo found that the fluid density is a function of temperature. This is the key to how Galileo thermometer works, such as water temperature increases or decreases from 4oC, reduced density.
Figure 3
Figure 3 shows a 1 kg hollow objects made of green materials. In the left-hand container, the density of liquid L. 1.001 kg / L of heavy objects that moved less than water, then the object floats. In the right container, the density of liquid L. 0.999 kg / L object heavier than the displaced water mass, the sink object. This indicates that very small changes in the density of the liquid easily can cause objects to float, almost float or sink.
In Galileo thermometer, a small glass ball partially filled with liquid (colored) are different. Effective density is adjusted by means of metal tags hanging from the bottom of the glass ball. Changes in density of the clear liquid, with changes in temperature, causing the lamp to rise or sink.
In Galileo thermometer, a small glass ball partially filled with liquid (colored) are different. Effective density is adjusted by means of metal tags hanging from the bottom of the glass ball. Changes in density of the clear liquid, with changes in temperature, causing the lamp to rise or sink.
Figure 4
Figure 4 shows a schematic representation of Galileo thermometer at two different temperatures (the temperature in this example is in Fahrenheit).
If there is some light at the top (Fig. 4, left) and some below, but floating in the gap, then the one floating in the gap (76o green) indicates the temperature. If there is no bulb in the gap (Fig. 4, right) then the average value of the ball above and below the gap to provide temperature estimates. The ball and weights should be measured as each "in detail so as not to jam with each other when the glass ball float or sink, at least half the diameter of the tube to maintain their stacking sequence or, alternatively, far less than the diameter of the tube to freely pass through each another in the tube.
If there is some light at the top (Fig. 4, left) and some below, but floating in the gap, then the one floating in the gap (76o green) indicates the temperature. If there is no bulb in the gap (Fig. 4, right) then the average value of the ball above and below the gap to provide temperature estimates. The ball and weights should be measured as each "in detail so as not to jam with each other when the glass ball float or sink, at least half the diameter of the tube to maintain their stacking sequence or, alternatively, far less than the diameter of the tube to freely pass through each another in the tube.
0 comments:
Post a Comment