Posted by **Eric** on Saturday, July 20, 2013 at 4:08pm.

In 1986 a gargantuan iceberg broke away from the Ross Ice Shelf in Antarctica. It was approximately a rectangle 160 km long, 45.0 km wide, and 250 m thick.

(a) What is the mass of this iceberg, given that the density of ice is 917 kg/m3?

(b) How much heat is required to melt it?

(c) Compare this amount of energy with the annual U.S. energy use of 8 multiplied by 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 100 W/m2, 13.00 h per day?

I know the answers and how to do the a,b,c, but I can't figure out the last one?

a.1.65e15; b.5.51e20; c.6.89; d.44.8Years

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