You are consulted by a company to assess the economic potential of the iceberg towing scheme. The company proposes to lasso an iceberg off the coast of Greenland, and tow it 2000km to the South East of England. (a) Estimate how large an iceberg can feasibly be towed by a 10,000 kW tug-boat at a speed of Im/s. Take the density of sea-water to be 1025 kg/m'. (b) Estimate how much the iceberg would melt during its journey, if the average sea temperature is 8°C.

You are consulted by a company to assess the economic potential of the iceberg towing scheme. The company proposes to lasso an iceberg off the coast of Greenland, and tow it 2000km to the South East of England. (a) Estimate how large an iceberg can feasibly be towed by a 10,000 kW tug-boat at a speed of Im/s. Take the density of sea-water to be 1025 kg/m'. (b) Estimate how much the iceberg would melt during its journey, if the average sea temperature is 8°C.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Spring Potential Energy

The potential energy is the energy possessed by a body by virtue of its position or the energy held by the object due to its position relative to other objects, its force like stresses, charge, and other factors affecting the particles of the body. The potential energy is the measure of the net work done by or on the body. The spring potential energy is the potential energy stored due to the deformation of an elastic spring and this elasticity is due to the stretched spring. The elasticity is the ability of a solid-state matter to come back to its equilibrium position or original position after any kind of external force is acted on it. It is also known as Elastic potential energy. The potential energy here is caused due to the displacement of the spring from its equilibrium position to another position and this potential energy is equal to the net work done due to the stretching of the spring. It also resembles the same mechanics of the oscillation of a simple pendulum, where due to the external force, the object moves from its equilibrium position to its maximum ends and the periodic motion continues till it comes back to the equilibrium position to rest. 

Question

You are consulted by a company to assess the economic potential of the iceberg towing scheme. The
company proposes to lasso an iceberg off the coast of Greenland, and tow it 2000km to the South-
East of England.
(a) Estimate how large an iceberg can feasibly be towed by a 10,000 kW tug-boat at a speed of
1m/s. Take the density of sea-water to be 1025 kg/m'.
(b) Estimate how much the iceberg would melt during its journey, if the average sea
temperature is 8°C.
(c) If the iceberg is sold to the water company at 1p per litre, do you think the scheme is
economically feasible? Assume that marine fuel costs 80p per litre, has a calorific content of
35MI per litre, and that the tug's engine efficiency is 30 %.

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Step 2 :Calculation of the time taken during the travel

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Step 3 :Calculation of the energy used by the boat

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Step 4 :Calculation of the maximum mass of the iceberg towed

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Step 5 :Calculation of the energy due to change in temperature

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Step 6 :Calculation of the mass of the ice melted per second

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