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Physics · GRAVITATION

हिन्दी

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The Moon has no atmosphere. Reason (R): The escape speed on the Moon's surface is approximately \( 2.3\text{ km/s} \), which is smaller than the thermal velocities of many gas molecules. In the light of the above statements, choose the correct answer from the options given below:

  1. Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
  3. (A) is true but (R) is false.
  4. (A) is false but (R) is true.

Correct answer · Option 1

Both (A) and (R) are true and (R) is the correct explanation of (A).

Explanation

Gas molecules if formed have thermal velocities larger than the escape speed (\( 2.3\text{ km/s} \)) and escape the Moon's gravitational pull.
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