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Gauge pressure: Pg = ρgh = 1.03×103×10×300 = 3.09×106Pa. F = PgA = 3.09×106×0.08 = 2.472×105N. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 2.47 × 10⁵ N. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCBI Bookshelf, Ideal Gas Law: P1V1/T1 = P2V2/T2.
The submarine’s rigid structure resists the external hydrostatic pressure (P = ρgh), which increases with depth, preventing collapse by balancing the inward force with structural strength. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Its rigid structure. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCBI Bookshelf, Ideal Gas Law: P1V1/T1 = P2V2/T2.
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