The quality chosen mercury thermometers is dilation. Mercury is used to build because it is a liqui

1.1. 1.2 Temperature Scale. Changes caused what is a bain marie by heat 1.3. Methods of Heat Transfer 1.4. Number of Heat 1.5. Laws of Gases Temperature Scale. Heat and temperature are different concepts that are closely related. While the former has to do with the internal energy of the body, the second is a qualitative appreciation of the sense of touch that depends on the material what is a bain marie and heat transfer capabilities. For example, if you put two glasses of water, one glass and one plastic and after a while, take it out, feel the cold more glass in the refrigerator. ------ Why do you think this phenomenon occurs? ------- Actually, both are at the same temperature. However, the energy transfer property of each is different: The glass is a better conductor what is a bain marie of heat than the plastic and therefore located more quickly heat to the same manner, if a timber pedaso one touch and metal, the latter will feel colder than wood, even though both are at the mista temperature, because the metal is a better conductor of heat. The temperature of a body is a measure of its relative state of warmth or cold, as well as its ability to transfer heat. It is defined as the physical quantity that indicates how hot or cold it is a substance on the body which is taken as the base or pattern. It is important to know that our body does not detect the temperature if no heat gain or loss. Did you know that when we feel that a body is very cold it is because our body is transferring heat? Indeed, if we touch a body, our sense of touch allows us to make a qualitative estimate of its temperature. However we have to measure it to make use of some measurable physical properties that vary with it. The instruments used to measure temperature are called thermometers. Some physical properties that vary with temperature are: The length of a bar, the volume of a liquid, the electrical resistance of a wire or the color of the filament of a lamp. These properties are used in the construction of various types of thermometers, such as mercury and alohol, the optical pyrometer and a thermocouple.
The quality chosen mercury thermometers is dilation. Mercury is used to build because it is a liquid material between -20 C and 100 C and that is much dilates. Above the metal is within a fine tube called a capillary, so that, when expanded, the tube forward motion; the more finer the more cemtimetros what is a bain marie tube progresses. You can establish a relationship between the level of expansion and temperature of a substance or a body measuring column lengths. In the figure below you can see the parts that constitute a mercury thermometer:
Thermal temperature scales or scales most commonly used are the Fahrenheit ( F), Celsius ( C) and the absolute or Kelvin (K); the latter is the unit used in the International System of Units (SI). Each scale considers two reference points-the upper and his lower and a number of divisions between the two points. The lower melting point is the ice which comprises a mixture of saturated water and the presence of ice admosfera, and the top is the boiling what is a bain marie point of water, what is a bain marie also at one atmosphere what is a bain marie pressure.
F ---> K K ---> F
1.2. CHANGES CAUSED BY HEAT Heat is a form of energy transferred between a system and its environment or between one system and another due to a temperature difference between the two, where the energy flows of the system of higher temperature to the lower temperature what is a bain marie . The heat and the thermal properties of matter are explained at present by the kinetic what is a bain marie theory. According to this theory, matter is made up of molecular particles that are in constant motion. Since heat is associated with a change in temperature and this in turn is related to the internal what is a bain marie molecular energy of a substance, it can be concluded that heat is a form of energy: Thermal energy that flows from a system of higher temperature to another child. So the temperature is not a measure of body heat, internal energy is increased when the temperature increases. The change in the internal energy of a body is given not only by the supply of heat, can also be given by the action of another form of energy. When heat is supplied to a substance, it can increase its Tempe