📊 Physics
Q. A hydrogen filled balloon rises in air because
  • (A) The density of air decreases with altitude
  • (B) The atmospheric pressure decreases with altitude
  • (C) The buoyant force exerted by the air on the balloon is greater than the weight of the balloon
  • (D) The acceleration due to gravity decreases with altitude
✅ Correct Answer: (C) The buoyant force exerted by the air on the balloon is greater than the weight of the balloon

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Ram Sharma
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