Help with Thermodynamics assignment

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connorx99
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Hi,
I am doing a level 3 engineering diploma, myself and the rest of my class are struggling to answer most of the questions on the attached assignment paper particularly questions 2, 4, and 6 and 7. I have worked out q1 to be 7.3 icebergs per year needed and 7.3 x 10^3 volume needed. Most of the other questions we do not have the resources or the prior knowledge to calculate. Q3 and 5 are written theoretical questions which I can do myself. Any help on any of the questions would be greatly appreciated by all of us.

Connor.
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Eimmanuel
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(Original post by connorx99)
Hi,
I am doing a level 3 engineering diploma, myself and the rest of my class are struggling to answer most of the questions on the attached assignment paper particularly questions 2, 4, and 6 and 7. I have worked out q1 to be 7.3 icebergs per year needed and 7.3 x 10^3 volume needed. Most of the other questions we do not have the resources or the prior knowledge to calculate. Q3 and 5 are written theoretical questions which I can do myself. Any help on any of the questions would be greatly appreciated by all of us.

Connor.

2. For a 108 m3 iceberg, estimate the fraction of ice originally leaving the Antarctic that would eventually reach the desert country.

For this question, you can “estimate” how much of ice is melted with the heat transfer via radiation, first for the whole journey.

Next, you can “estimate” how much ice is melted due to the “water resistance” (frictional force)
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Eimmanuel
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(Original post by connorx99)
Hi,
I am doing a level 3 engineering diploma, myself and the rest of my class are struggling to answer most of the questions on the attached assignment paper particularly questions 2, 4, and 6 and 7. I have worked out q1 to be 7.3 icebergs per year needed and 7.3 x 10^3 volume needed. Most of the other questions we do not have the resources or the prior knowledge to calculate. Q3 and 5 are written theoretical questions which I can do myself. Any help on any of the questions would be greatly appreciated by all of us.
Connor.

4. Compare quantitatively the energy required to melt the 108 m3 iceberg with the energy required to tow it 104 km.

Just calculate the amount of thermal energy required to melt the iceberg
= mass of iceberg × Energy required to melt ice at 0°C per kg

Energy required to tow iceberg 104 km
= Force × speed × duration of time
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Eimmanuel
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(Original post by connorx99)
Hi,
I am doing a level 3 engineering diploma, myself and the rest of my class are struggling to answer most of the questions on the attached assignment paper particularly questions 2, 4, and 6 and 7. I have worked out q1 to be 7.3 icebergs per year needed and 7.3 x 10^3 volume needed. Most of the other questions we do not have the resources or the prior knowledge to calculate. Q3 and 5 are written theoretical questions which I can do myself. Any help on any of the questions would be greatly appreciated by all of us.

Connor.
6. Discuss, with suitable calculations, the choice between allowing the ice to melt in the sun and melting it using electrical energy. Assume that a 250 MW generating station is available nearby.

You can calculate the amount of ice melted per day using solar radiation (which is free). Does this amount of water meet the demand per day?

Next, you want to calculate the amount of ice melted in one day using the 250 MW generating station is available nearby. Does this amount of water meet the demand per day?
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Eimmanuel
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(Original post by connorx99)
Hi,
I am doing a level 3 engineering diploma, myself and the rest of my class are struggling to answer most of the questions on the attached assignment paper particularly questions 2, 4, and 6 and 7. I have worked out q1 to be 7.3 icebergs per year needed and 7.3 x 10^3 volume needed. Most of the other questions we do not have the resources or the prior knowledge to calculate. Q3 and 5 are written theoretical questions which I can do myself. Any help on any of the questions would be greatly appreciated by all of us.

Connor.

7. Compare the daily costs of desalination with those of electrical melting (with no energy input from the sun).

You have calculated the amount of electrical energy used to melt the ice in 6, so you should be able to compute the cost.

As for the cost of desalination, use the data given to you and should be able to work out the cost.
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