Mass-Energy Equivalence
Mass-Energy Equivalence is a Science & Technology concept from the MPSC syllabus, tested in 2 past MPSC questions (2022). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.
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दिलेल्या अणु विखंडन क्रियेत, 1000 ग्रॅ. ²³⁵₉₂U अणूचे विखंडन होऊन ______ इतकी ऊर्जा तयार होईल.
(a)4.3 × 10⁹ किलो कॅलरी
(b)186 मिलियन इलेक्ट्रॉन व्होल्ट (MeV)
(c)2 × 10⁷ किलो कॅलरी
(d)1.83 × 10¹⁰ किलो कॅलरी
The energy released by the fission of 1000 grams (1 kg) of U-235 is calculated to be approximately 1.83 × 10¹⁰ kilo calories.
विखंडन प्रक्रियांमध्ये निर्माण होणाऱ्या ऊर्जेचे प्रमाण खालीलपैकी कोणत्या बाबीवर/बाबींवर अवलंबून असते ? In fission processes, the amount of energy released depends on which of the following factor/s ?
(a)अभिक्रिया कारकाचे वस्तुमान / The mass of the reactant
(b)उत्पाद्याचे वस्तुमान / The mass of the product
(c)अभिक्रियाकारक आणि उत्पाद्याचे वस्तुमान / The mass of the reactant and product
(d)विखंडनांच्या वेळी कमी झालेले वस्तुमान / The loss in mass during fission
In nuclear fission processes, the energy released is directly proportional to the mass defect (loss in mass during fission, based on Einstein's E=mc^2), which is derived from the difference between reactant and product masses.