What is the skin friction coefficient and how does it vary

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1. What is the skin friction coefficient and how does it vary over a flat plate (laminar and turbulent)?

2. What is the effect of compressibility on skin friction?

3. What are the two main types of drag?

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What is the skin friction coefficient and how does it vary : 1. what is the skin friction coefficient and how does it vary over a flat plate laminar and turbulent?2. what is the

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