Icebergs in the North Atlantic present hazards to shipping (see Fig. 23-30), causing the length of shipping routes to increase by about 30% during the iceberg season. Strategies for destroying icebergs include planting explosives, bombing, torpedoing, shelling, ramming, and painting with lampblack, suppose that direct melting of the iceberg, by placing heat sources in the ice, is tried. How much heat is required to melt 10% of a 210,000-metric-ton iceberg? (one metric ton = 1000 kg.)

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Navjyot Kalra · Answer

To obtain the heat that is required to melt 10% of a 210,000-metric-ton iceberg, substitute 210,000-metric-ton for mass of the iceberg m and 333 ×10³ J/kg for latent heat of fusion of water in the equation Q = 10% (Lm),

From the above observation we conclude that, the heat that required to melt 10% of a 210,000-metric-ton iceberg would be 7.0×10¹² J.

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