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  2. Calorie - Wikipedia

    en.wikipedia.org/wiki/Calorie

    The calorie is a unit of energy that originated from the caloric theory of heat. [1] [2] The large calorie, food calorie, dietary calorie, kilocalorie, or kilogram calorie is defined as the amount of heat needed to raise the temperature of one liter of water by one degree Celsius (or one kelvin).

  3. Units of energy - Wikipedia

    en.wikipedia.org/wiki/Units_of_energy

    The calorie is defined as the amount of thermal energy necessary to raise the temperature of one gram of water by 1 Celsius degree, from a temperature of 14.5 °C, at a pressure of 1 atm. For thermochemistry a calorie of 4.184 J is used, but other calories have also been defined, such as the International Steam Table calorie of 4.1868 J.

  4. Specific energy - Wikipedia

    en.wikipedia.org/wiki/Specific_energy

    A nutritional Calorie is equivalent to a thousand chemical or thermodynamic calories (abbreviated "cal" with a lower case "c") or one kilocalorie (kcal). Because food energy is commonly measured in Calories, the energy density of food is commonly called "caloric density". [ 7 ]

  5. What Is a Calorie Deficit & How Does It Really Impact Weight ...

    www.aol.com/calorie-deficit-does-really-impact...

    In general, a gradual calorie deficit of 500 to 750 calories a day is considered safe and sustainable for most people, leading to a weight loss of about one to two pounds a week. Kateryna ...

  6. A calorie is a calorie - Wikipedia

    en.wikipedia.org/wiki/A_calorie_is_a_calorie

    A kilocalorie is the equivalent of 1000 calories or one dietary Calorie, which contains 4184 joules of energy.The notion that "a calorie is a calorie" is related to the idea that weight maintenance is a result of equalizing calorie input and calorie output, [4] and may lead to the practice of calorie restriction.

  7. Energy budget - Wikipedia

    en.wikipedia.org/wiki/Energy_budget

    Calorie is the basic unit of measurement. An organism in a laboratory experiment is an open thermodynamic system, exchanging energy with its surroundings in three ways - heat, work and the potential energy of biochemical compounds .

  8. Food energy - Wikipedia

    en.wikipedia.org/wiki/Food_energy

    For an overall efficiency of 20%, one watt of mechanical power is equivalent to 18 kJ/h (4.3 kcal/h). For example, a manufacturer of rowing equipment shows calories released from "burning" food as four times the actual mechanical work, plus 1,300 kJ (300 kcal) per hour, [16] which amounts to about 20% efficiency at 250 watts of mechanical output.

  9. Mechanical equivalent of heat - Wikipedia

    en.wikipedia.org/wiki/Mechanical_equivalent_of_heat

    The change in unit was the result of the demise of the calorie as a unit in physics and chemistry. Both von Mayer and Joule met with initial neglect and resistance despite having published in leading European physics journals, but by 1847, a lot of leading scientists of the day were paying attention.