What statement is true concerning heat...

Question 1 / 205eccef9dbacbc34ba4d45e4c

Question 1 of 205eccef9dbacbc34ba4d45e4c

What statement is true concerning heat transfer rates by the heat transfer mode of natural convection?

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Question 1 of 20

5eccef9dbacbc34ba4d45e4c

What statement is true concerning heat transfer rates by the heat transfer mode of natural convection?

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🔍 Key Concepts

• Natural convection depends on fluid motion caused by buoyancy (density differences due to temperature differences). • As a fluid is heated, its density changes; this density difference drives the motion that carries heat. • Think about how a larger temperature difference (ΔT) affects the density difference and thus the convection strength.

💭 Think About

• If the temperature difference between hot and cold regions increases, what happens to the density difference between those regions? Larger, smaller, or unchanged? • In natural convection, does stronger buoyant force (from bigger density differences) tend to increase or decrease the heat transfer rate? • Look at each option’s wording: is heat transfer rate moving in the same direction or the opposite direction as density difference, and is density difference moving in the same or opposite direction as temperature gradient?

✅ Before You Answer

• Be clear whether a quantity is directly proportional (goes up when the other goes up) or inversely proportional (goes up when the other goes down). • Mentally test an extreme case: if the temperature gradient is very large, should the density difference and heat transfer rate be large or small in natural convection? • Eliminate any option where the described relationships don’t match how buoyancy-driven flow behaves when fluid is strongly heated from below and cooled above.

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Question 1 of 20

What statement is true concerning heat transfer rates by the heat transfer mode of natural convection?

Heat transfer rates are inversely proportional to the difference in fluid densities which, in turn, is directly proportional to the temperature gradient.

Heat transfer rates are inversely proportional to the difference in fluid densities which, in turn, is inversely proportional to the temperature gradient.

Heat transfer rates are directly proportional to the difference in fluid densities which, in turn, is inversely proportional to the temperature gradient.

Heat transfer rates are directly proportional to the difference in fluid densities which, in turn, is directly proportional to the temperature gradient.

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Question 1 / 205eccef9dbacbc34ba4d45e4c

Question 1 of 205eccef9dbacbc34ba4d45e4c

What statement is true concerning heat transfer rates by the heat transfer mode of natural convection?

Back

Question 1 of 20

5eccef9dbacbc34ba4d45e4c

What statement is true concerning heat transfer rates by the heat transfer mode of natural convection?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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