How do thermometers?

Adsense Pub

The thermometer is the instrument to measure temperature. Use numeric values determined on fixed points, such as boiling water and melting ice. Among the different types of thermometers are those of mercury, resistance, thermistors, thermocouples and optical pyrometer. The first are the most common and consist of a glass tube that has inside a capillary, also of glass, connected to a mercury-filled blister. To contact with the heat, the mercury in the bulb expands and rises in the capillary. The latter are of great precision, and have a coil of platinum wire connected to an instrument for measuring electrical resistance. Thermistors and thermocouples used sensing elements that respond rapidly to changes in temperature, while the optical pyrometer used to measure temperature of solids in excess of 700 º C.

Who invented the thermometer?

Galileo is credited with the invention of the thermometer. But mercury thermometers and alcohol were created in the eighteenth century by the German physicist Gabriel Fahrenheit.

What are the most popular stop?

The best known are the Celsius and Fahrenheit. On a scale created by the Swedish astronomer Anders Celsius, known as the centigrade scale, the freezing point is 0 ° C and the boiling point of 100 º C. While on the Fahrenheit scale the boiling point is 212 º F and the freezing, 32 º F.

  1. About regard the Bible as a sacred book?
  2. For Jews and Christians, the Bible is a collection of sacred books
  3. religion/about-regard-the-bible-as-a-sacred-book.htm
  4. Who was Moliere?
  5. Jean Baptiste Poquelin, known as Molière, was a prominent French playwright and
  6. literature/who-was-moliere.htm
  7. What is terrorism?
  8. Is the systematic use of violence to instill fear among public authorities,
  9. sociology/what-is-terrorism.htm
  10. Who was Nero?
  11. Nero was a Roman emperor who belonged to the Julia-Claudian dynasty, which
  12. persons/who-was-nero.htm
  13. What are the poisonous animals?
  14. There are animals that develop substances poisonous to other living things that
  15. biology/what-are-the-poisonous-animals.htm