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प्रश्न
The atmospheric pressure at earth's surface is P1 and inside mine is P2. They are related as :
विकल्प
P l =P2
P l > P2
P l < P2
P2 = 0
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उत्तर
The atmospheric pressure at earth's surface is P1 and inside mine is P2. They are related as : P l < P2
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