Thermal Induction
Thermal Induction - Related Videos
11:33
Inductance
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN This experiment will use inductive coils to demonstrate the concept of inductor and inductance. Magnetic induction will be demonstrated using a rod magnet inserted into or extracted away from the core of a coil to induce a transient electromotive force (emf) voltage in the coil, measured by a voltmeter. This experiment will also demonstrate the mutual inductance between...
09:42
Analysis of Thermal Expansion via Dilatometry
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2023
Source: J. Jacob Chavez, Ryan T. Davis, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Thermal expansion is extremely important when considering which materials will be used in systems that experience fluctuations in temperature. A high or low thermal expansion in a material may or may not be desirable, depending on the application. For instance, in a common liquid thermometer, a material with a high thermal expansion would be...
05:45
Rapid Determination of the Thermal Nociceptive Threshold in Diabetic Rats
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Cited by 10 •
2012
Here, we describe a rapid reliable and simple procedure to determine the lowest temperature at which rats or mice show nocifensive behavior, i.e. the thermal nociceptive threshold (TNT). This method applies a slowly increasing thermal stimulus allowing precise and reproducible estimation of TNTs with minimum, if any, stress to the animals.
10:32
Thermal Diffusivity and the Laser Flash Method
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2023
Source: Elise S.D. Buki, Danielle N. Beatty, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT The laser flash method (LFA) is a technique used to measure thermal diffusivity, a material specific property. Thermal diffusivity (α) is the ratio of how much heat is conducted relative to how much heat is stored in a material. It is related to thermal conductivity (), how much heat is transferred through a material due to a temperature...
01:27
Thermal expansion and Thermal stress: Problem Solving
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2023
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures? To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.
FAQs
Heating can make a change possible when reactant molecules gain enough energy to cross an activation barrier, the energy threshold separating starting materials from products. Raising temperature increases molecular motion and the likelihood that this threshold is reached. Consequently, thermal induction can alter whether a reaction proceeds and how rapidly it develops.
Temperature sets the thermal condition, time determines how long the material receives that condition, and material properties influence how it responds. Changing any of these factors can change whether a process begins, how quickly it proceeds, or whether a transformation reaches the intended extent. Considering them together helps chemists optimize controlled heat-driven changes.
Thermal induction can lead either to a chemical reaction or to a phase transition, and the distinction is the type of change being driven. Reactions use the supplied energy to help reactants form products, whereas phase transitions describe heat-driven changes in matter. Separating these outcomes clarifies what transformation the experiment is designed to study.
Before applying heat, chemists should relate the intended outcome to temperature, exposure time, and the material’s properties. These conditions determine whether heating merely accelerates an existing process or initiates a new change. Deliberate control is important for safer reaction design and for adjusting reaction rates during process optimization.
Thermal induction is useful in polymerization because heat can serve as the trigger that starts this class of chemical transformation. Researchers can therefore examine how heating conditions affect the onset and progress of polymer formation, while using temperature, time, and material properties as control factors. This makes thermally initiated polymerization relevant to process optimization and material development.
Thermally responsive materials are studied because their behavior changes in response to supplied heat. Thermal induction provides a way to examine those heat-driven transformations and relate them to temperature, exposure time, and material properties. Such work can support development of materials designed to respond to thermal conditions, while also improving understanding of changes in matter.