SI Units

जूल

परिभाषा

ऊर्जा की SI इकाई, एक न्यूटन बल द्वारा एक मीटर दूरी पर किए गए कार्य के बराबर (1 J = 1 N·m)।

व्याख्या

Named after physicist James Prescott Joule. Lifting a 100 g apple by 1 meter requires approximately 1 joule of energy. A food calorie (kcal) equals 4,184 joules; a AA battery stores about 9,000 J; an average human daily caloric intake of 2,000 kcal equals roughly 8.4 million joules.

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