Tuesday

July 29, 2014

July 29, 2014

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

(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

- physics -
**Elena**, Sunday, July 21, 2013 at 5:50am(a) m=ρ•V= ρ•L•W•H=917•160000•45000•250=1.65•10¹⁵ kg

(b) Q=mL=1.65•10¹⁵•334000=5.51•10²º J

(c) Q/Q(US) =5.51•10²º/8•10¹⁹=6.89

(d) Q/q= 5.51•10²º/100•160000•45000•13•3600 •365.25 =44.8yr

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