If the Sun Converts 5 × 10¹¹ Kg of H

question 17

Multiple Choice

If the Sun converts 5 × 10¹¹ kg of H to He per second,and the mass of a single hydrogen nucleus is 1.7 × 10⁻²⁷ kg,how many net proton-proton reactions go on per second in the Sun? What is the luminosity produced if the mass difference between a single helium nucleus and four hydrogen nuclei is 4 × 10⁻²⁹ kg? Note that 1 watt (W) = 1 m² kg/s³.

• A) 7 × 10³⁷ reactions per second; 3 × 10²⁶ W
• B) 3 × 10³⁸ reactions per second; 10²⁷ W
• C) 3 × 10³⁸ reactions per second; 4 × 10²⁶ W
• D) 7 × 10³⁷ reactions per second; 5 × 10²⁵ W

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