heat Flashcards
What is Temperature?
measure of the Mean KInetic energy POssesed by particles That form an object
what is use to measure temperature and who invented it first?
thermometer
Gallileo Galilei
1600A.D
what are types of thermometers?
Glass mercury
Glass Alcohol
Digital
what are the uses of glass mercury thermometer?
*has a uniform Expansion over a broad range of temperature
*good thermal conductor
*liquid over a broad range of temperature
what are the disadvantage of glass mercury thermometer?
mercury is toxic
what is use in glass alcohol thermometer?
ethyl Alcohol
what is the melting point of ethanol?
-115 degrees celsius
measuring low temperatures
what are the uses of glass alcohol thermometer?
*has a high expansion relative to most other liquids
*expansion increases uniformly with temperature
in what thermometer you can read temperature directly?
in digital thermometer
what are special features of clinical thermometer?
*there is a fine bend in the capillary tube containing mercury
*temperature range is short
(35 degrees celsius to 43 degrees celsius)
how to use thermometers correctly?
*thermometer should be held vertically
so bulb of the thermometer is well in contact with substance/liquid of temperature which should be measured.
*when taking readings should be adjusted to eye level
what are 3 temperature scales?
*Celsius scale
*Fahrenheit scale
*Kelvin scale
who introduced Celsius scale?
Anderse Celsius
who introduced Fahrenhite scale?
Gabriel Fahrenhite
who introduced Kelvin scale?
Lord Kelvin