Definition of Temperature
Temperature shows a degree of heat on the body. Or simply, the higher the temperature of the object, the hotter the object. Microscopically, temperature indicates the energy possessed by an object. At each atom in each object moves, both in the form of displacement or motion at the vibration location. The higher the energy of the atoms making up an object, the higher the temperature of the object.
Temperature can also be called temperature measured by a device called a thermometer. There are four types of thermometers that are best known, namely Celsius, Fahrenheit, Reaumur and Kelvin. The comparison between one type of thermometer with another follows:
C: R: (F-32) = 5: 4: 9
K = C + 273. (degree)
Because from Kelvin to degrees Celsius, Kelvin starts from 273 degrees, not from -273 degrees. And degrees Celsius starting at 0 degrees. Kelvin temperature is the same ratio to degrees Celsius which is 5: 5, then to change the temperature to another temperature, it is better to use or change it to degrees Cecius first, because if we use Kelvin it will be more complicated to change it to another temperature.
Measuring instrument
Qualitatively, we can see that temperature is a sensation of cold or warmth of an object that is felt when touching it, with this we can find out by using a thermometer. The temperature can be measured using a thermometer that contains mercury or alcohol. The word thermometer is taken from two words namely "thermo" which means "heat" and meter which means "to measure".
Thermometer type
Some types of thermometers include:
alcohol thermometer
basal thermometer
mercury thermometer
oral thermometer
Galileo thermometer
infrared thermometer
liquid crystal thermometer
thermistor
Thermometers are often used
Thermometers are usually used as follows:
Bulb thermometer (mercury or alcohol)
Use a bulb (large bubble) at the bottom of the container to store the liquid, as well as a narrow tube (caliper hole) as a suppressor to change the volume or place of expansion of the liquid.
In principle, a liquid's volume changes with temperature. The liquid that is removed is sometimes a colored alcohol but it can also be a metallic liquid called mercury, both of which can expand when heated and shrink when cooled.
There are numbers along the glass tube which is a sign of the amount of temperature.
Its advantages are that it is not easily contaminated with chemicals, does not require assistive devices, is relatively inexpensive, and its weaknesses are easily broken, easily contaminated with liquids (alcohol or mercury), glass / glass contamination, and complicated measurement procedures (dyeing).
Spring thermometer
Using a coil (flat plate) made of metal that is sensitive to heat, at the tip of the spering is a pointer.
If the air is hot, the coil (metal) expands so that the pointer moves up, whereas if the metal air cools the pointer moves down.
The use of a spring thermometer must always protect the capillary tube and the sensor tip (probe) against friction or impact.
Non-contact thermometer
Infrared thermometer can detect temperature with an optical object as long as the object is observed, infrared radiation energy is measured, and given as temperature, by knowing the amount of infrared energy emitted by the object and its emissions, the temperature of the object can be distinguished.
Electronic thermometer
Two types are used in processing, namely thermocouple and resistance thermometer. Typically, industries use nominal resistance of 100 ohms at 0 ° C so it is called a Pt-100 sensor. Pt is a symbol for platinum, 100 ohm sensor standard sensitivity is nominal 0.385 ohms / 0 ° C, RTDs with sensitivity of 0.375 and 0.392 ohms / 0 ° C also exist.
Understanding Expansion, Kinds, Types, Formulas, Concepts, Effects and Examples is the increase in the size of objects that occur due to an increase in the temperature of a substance. When a material is warming, its volume always increases and each dimension increases simultaneously
Understanding Expansion
Expansion is an increase in the size of an object that occurs due to an increase in the temperature of a substance. When a material experiences heating, its volume always increases and each dimension increases simultaneously (De Chiara, 1978). At the microscopic level can determine the accuracy of the relationship between the length of the object with changes in temperature, the increase in size can be understood in terms of increasing kinetic energy due to each molecule colliding very strongly with the molecule next to it. Molecules will push each other apart and develop material (Joseph, 1998).
Understanding Expansion is the increase in an object's size due to an increase in the temperature of the substance. The expansion can occur in substances that are solid, liquid, and also gas. The magnitude of the expansion of the substance is very dependent on the size of the first object, the rise in temperature and also the type of substance. The effect of the expansion of these substances is very useful in the development of various technologies.
Understanding heat expansion is the change in an object that can be increased in length, width, area, or also changes in volume due to heat exposure. The expansion of each object will be different, depending on the surrounding temperature and also the expansion coefficient or also the expansion power of the object.