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Hannah Montana

on 30 April 2013

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Transcript of Thermometer

http://www.middleschoolchemistry.com/multimedia/chapter1/lesson3 Thermometer By: Elliot, Tianna & Jenna Why can't we use any type of liquid inside a thermometer? We can't use certain liquids because, for example water freezes after reaching 0 degrees Celsius and boils after 100 degrees Celsius. So if it reaches those temperatures the thermometer won't work. We use mercury and alcohol more in thermometers because the freezing and boiling points are really low and high. http://www.middleschoolchemistry.com/multimedia/chapter1/lesson3 Who created the Thermometer? What is a thermocouple? It is a thermoelectric device for measuring temperature, using two wires of different metals connected at two points. A thermocouple consists of two dissimilar conductors in contact, which produce a voltage when heated. The size of the voltage is dependent on the difference of temperature of the junction to other parts of the circuit. There are many different types of thermometers and some are used to check body temperatures! Some are to check food temperatures... and to check outside temperatures... Who designed the thermometer? Gabriel Fahrenheit was a Dutch-German-Polish physicist, engineer, and glass blower who is best known for inventing the mercury thermometer, and for developing a temperature scale, now named after him. How do they work? In a thermocouple circuit the current continues to flow as long as the two junctions are at different temperatures. The magnitude and direction of the current depends on the temperature difference between the junctions and the properties of the metals used in the circuit. This is known as the Seebeck effect. Thermometers and Thermocouples both can let us see how, and where heat goes in one or more matter. Thermocouple What is a Thermometer? A thermometer is a device that measures temperature or temperature gradient. A thermometer needs a temperature sensor i n which physical change occurs. welcome to the world of thermometers and heat!
in this world, you'll know how do thermometers and thermocouples work, soon. you will see what did the designers of thermometers think and know about heat moves:-)! In our daily lives we have started using alcohol
in thermometers because mercury is poisonous. Ya Came To Da Wrong Hood
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