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Related Concept Videos

Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
Quantifying Heat02:46

Quantifying Heat

Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...
Heating and Cooling Curves02:44

Heating and Cooling Curves

When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
Heat Flow and Specific Heat01:12

Heat Flow and Specific Heat

Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is the kilocalorie...
Temperature and Thermal Equilibrium01:11

Temperature and Thermal Equilibrium

Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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Related Experiment Video

Updated: May 10, 2026

Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats
04:55

Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats

Published on: June 17, 2020

Heat: not black, not white. It's gray!!!

Laxmi Prabha Singh, Medha Kapoor, Shashi Bala Singh

    Journal of Basic and Clinical Physiology and Pharmacology
    |June 12, 2013
    PubMed
    Summary

    Heat-related illness (HRI) poses a growing global health threat due to rising temperatures. Understanding HRIs at physiological and molecular levels is crucial for developing effective prevention and treatment strategies.

    Area of Science:

    • Environmental Health
    • Physiology
    • Molecular Biology

    Background:

    • Heat-related illness (HRI) encompasses a spectrum of conditions, from mild heat cramps to fatal heatstroke.
    • HRIs are a significant cause of global mortality, exacerbated by increasing global temperatures.
    • Accurate identification and estimation of heat-related morbidity and mortality remain challenging.

    Purpose of the Study:

    • To review the physiological and molecular basis of various HRIs.
    • To summarize current research and initiatives for combating HRIs.
    • To explore the dual role of heat, including its therapeutic applications (thermotherapy).

    Main Methods:

    • Literature review of heat-related illnesses.
    • Analysis of physiological and molecular mechanisms underlying heat stress.

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    Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management

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    Related Experiment Videos

    Last Updated: May 10, 2026

    Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats
    04:55

    Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats

    Published on: June 17, 2020

    Characterization of Thermal Transport in One-dimensional Solid Materials
    05:20

    Characterization of Thermal Transport in One-dimensional Solid Materials

    Published on: January 26, 2014

    Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
    06:43

    Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management

    Published on: November 21, 2017

  • Examination of thermotherapy applications in disease management.

    • Main Results:

    • Heat stress contributes to respiratory, cardiovascular, and cerebrovascular disorders, often leading to attributed deaths.
    • Occupational groups like soldiers and athletes are particularly vulnerable to HRIs.
    • Thermotherapy shows potential in improving quality of life for conditions like fibromyalgia, heart disease, cancer, chronic pain, and depression.

    Conclusions:

    • A comprehensive understanding of HRIs at both physiological and molecular levels is essential for improved prevention and treatment.
    • Heat has a dual impact, causing illness but also offering therapeutic benefits through thermotherapy.
    • Further research is needed to fully harness heat's benefits while mitigating its risks.