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Pradeep

UP Board 10th Class 2021 (For Hindi Medium Students)
About UP Board Crash Course
3 years ago
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1 Answer
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Ashok Kumar

3 years ago

इलेक्ट्रॉन का द्रव्यमान 9.1×10^(-31) प्रोटॉन का द्रव्यमान 1.66×10^(27) न्यूट्रॉन का द्रव्यमान1.66×10^(27) प्लांक नियतांक(h)6.626×10^(-34)julesec प्रकाश की चाल 3×10^(8)m/s 1इलेक्ट्रॉनवोलट1.60217653×10^(-19)जूल^2 1 कैलोरी 4.18 जूल 1amu 1.667×10^(-24) g.

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