Temperature is one of the fundamental (base) quantities. During the day we feel hot, but cool at night.
Fire is hot, but ice is cold. A hot object is said to have high temperature, but a cold object has low temperature.
Thus temperature shows the degree of hotness and coldness of an object.
Your palm can feel the hotness or coldness of a thing. But can you use it to measure temperature ?
. The common measuring tool for temperature is a thermometer. A thermometer consists of a long glass tube with a narrow column, called capillary pipe, containing liquid, alcohol or mercury. But, the upper part is vacuum.
The kinds of temperature scales : Fahrenheit, Celsius, Reamur and Kelvin.
There are four commonly used temperature scales in existence they are: Celsius: The celcius scale is defined such that the freezing point of water is 0°C and the boiling point of water is at 100°C. Absolute zero occurs at –273.15°C.
Kelvin: The kelvin scale is the celcius scale offset such that absolute zero occurs at 0 K. This means water freezes at 273 K and boils at 373K.
Fahrenheit: The fahrenheit scale is defined such that the freezing point of water is 32°F and the boiling point of water is at 212°F. Absolute zero occurs at –460°F.
Reamur: The reamur scale is defined such that the freezing point of water is 0°R and the boiling point of water is at 80°R. Absolute zero occurs at –218,4 °R.
ScaleAbsolute ZeroFreezing point Boiling Point Celcius-273 o C0 o C100 o C Reamur-218,4 o R0 o R80 o R Fahrenheit-460 o F32 o F212 o F Kelvin0 K273 K373 K
1.Convert the following temperatures into Kelvin! a. 75 o F b. 28 o C c. 86 o C d. 46 o C 2. What does 40 o C equal to if measured by using these following thermometer ? a. Reamur b. Fahrenheit c. Kelvin