# physics

posted by .

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

• physics -

(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

## Similar Questions

1. ### chemistry

Icebergs in the North Atlantic present hazards to shipping, causing the length of shipping routes to increase by about 30 percent during the iceberg season. Attempts to destroy icebergs include planting explosives, bombing, torpedoing, …
2. ### Science

If the density of ice is 0.92 g/cm^3, what percent of an ice cube’s (or iceberg’s) mass is above water.
3. ### physics

If an iceberg at 0 degrees C has a mass of 200,000,000 kg, how much heat would be required to melt the entire iceberg and raise the melt water to 8.0 degrees C?
4. ### physics

Icebergs in the North Atlantic present hazards to shipping, causing the length of shipping routes to increase by about 30 percent during the iceberg season. Attempts to destroy icebergs include planting explosives, bombing, torpedoing, …
5. ### chemistry

if an iceberg has a volume of 8660 cubic feet, what is the mass in kg of the iceberg?
6. ### physics

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 …
7. ### Physics

Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 114 km long, 31.3 km wide, and 194 m thick. (a) How much heat in joules would be required to melt this iceberg (assumed to be at 0 …
8. ### good Samaritan school

The density of the ice is 918kgm-3 and that of water is 1030kgm-3. An iceberg floats with a portion of 224 litre outside water. Find the volume of the iceberg.
9. ### physics

A ship is anchored in a bay. The echo of the ship's foghorn, reflected from an iceberg, is heard 5.0 seconds after the horn is sounded. The temperature of the air is -10.0 degrees Celsius. How many meters away is the iceberg?
10. ### Physics

A 66000 kg iceberg at −6.7◦C breaks away from the polar ice shelf and floats away into the ocean at 6.36◦C. What is the final change in the entropy of the system, when the iceberg has completely melted?

More Similar Questions