What is the mass of this iceberg, given that the density of ice is 917 kg/m3? kg (b) How much heat is required to melt it? The latent heat of fusion of ice is 79.8 kcal/kg or 334 kJ/kg. J (c) Compare this amount of energy with the annual U.S. energy use of 8 ✕ 1019 J by taking a ratio. Eice EUS = (d) How many years (365.25 days) would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 145 W/m2, 10.50 h per day?
What is the mass of this iceberg, given that the density of ice is 917 kg/m3? kg (b) How much heat is required to melt it? The latent heat of fusion of ice is 79.8 kcal/kg or 334 kJ/kg. J (c) Compare this amount of energy with the annual U.S. energy use of 8 ✕ 1019 J by taking a ratio. Eice EUS = (d) How many years (365.25 days) would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 145 W/m2, 10.50 h per day?
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In 1986 a gargantuan iceberg broke away from the Ross Ice Shelf in Antarctica. It was approximately a rectangle 165 km long, 36.0 km wide, and 250 m thick.
(a) What is the mass of this iceberg, given that the density of ice is 917 kg/m3?
kg
(b) How much heat is required to melt it? The latent heat of fusion of ice is 79.8 kcal/kg or 334 kJ/kg.
J
(c) Compare this amount of energy with the annual U.S. energy use of 8 ✕ 1019 J by taking a ratio.
=
(d) How many years (365.25 days) would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 145 W/m2, 10.50 h per day?
yr
kg
(b) How much heat is required to melt it? The latent heat of fusion of ice is 79.8 kcal/kg or 334 kJ/kg.
J
(c) Compare this amount of energy with the annual U.S. energy use of 8 ✕ 1019 J by taking a ratio.
Eice |
EUS |
(d) How many years (365.25 days) would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 145 W/m2, 10.50 h per day?
yr
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