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Question

বরফ মাধ্যমে আলাের বেগ

2.3 \times 10^{8} m s^{- 1}

বাতাসের সাপেক্ষে বরফের সংকট কোণ হবে-

θ c = 90 °

θ c = 50, 1 °

θ c = 70 °

θ c = 30 °

ANS : 2

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