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One square metre of the Earth receives about 1.4 kilojoules of solar radiation every second in full daylight. [19] A human in a sprint has approximately 3 kJ of kinetic energy, [20] while a cheetah in a 122 km/h (76 mph) sprint has approximately 20 kJ. [21] One watt-hour, of electricity or any other form of energy, is 3.6 kJ. megajoule
Since there are 6.02214076 × 10 23 particles (atoms, molecules, ions etc.) per mole, 1 joule per mole is equal to 1 joule multiplied by 6.02214076 × 10 23 particles. Because of the typical order of magnitude for energy changes in chemical processes, kJ·mol −1 is normally used instead of J·mol −1.
Grams TNT Symbol Tons TNT Symbol Energy [joules] Energy [Wh] Corresponding mass loss [a] milligram of TNT mg nanoton of TNT nt 4.184 J or 4.184 joules 1.162 mWh 46.55 fg gram of TNT g microton of TNT μt 4.184 × 10 3 J or 4.184 kilojoules 1.162 Wh 46.55 pg kilogram of TNT kg milliton of TNT mt 4.184 × 10 6 J or 4.184 megajoules 1.162 kWh 46.55 ng
A moderate energy density would be 1.6 to 3 calories per gram (7–13 kJ/g); salmon, lean meat, and bread would fall in this category. Foods with high energy density have more than three calories per gram (>13 kJ/g) and include crackers, cheese, chocolate, nuts, [10] and fried foods like potato or tortilla chips.
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kJ/kg may refer to: kilo joules per kilo gram; The SI derived units of specific energy; Specific Internal energy; Specific kinetic energy; Heat of fusion; Heat of ...
A standard-size 3 Musketeers bar (60 g) has 257 kilocalories (1,080 kilojoules) of food energy, 7 grams of total fat, and 40 grams of sugar, while the mini-size bar (serving size 41 g) has 179 kilocalories (750 kilojoules), 5 grams of total fat, and 27 grams of sugar. [14]
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.