11th Class Physics Gravitation / गुरुत्वाकर्षण Question Bank Gravitation Conceptual Problems

  • question_answer
    The moon has no atmosphere. Why?

    Answer:

                    Due to the small value of \['g'\], the escape velocity on the moon surface is small\[\left( \text{2}.\text{38 km}{{\text{s}}^{\text{-1}}} \right)\]. The air molecules have thermal velocities greater than the escape velocity. Therefore, the air molecules escape away and cannot form atmosphere on the moon.


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