Estimate the time required to melt a 5-mm sheet of ice on an aircraft wing if the wing surface is heated to 60ºC and the surrounding air is -10ºC. Assume that the average convective heat transfer coefficients are 20 W/m^2? K for the air/ice and 10 W/m^2?K for the ice/melted water.

What will be an ideal response?




Physics & Space Science

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Suppose that a star has twice the surface temperature of the sun and also twice the radius. How many times larger is the rate at which this star emits energy compared to the rate at which the sun emits energy?

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What are coronal holes?

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Briefly explain how the Sun became hot enough for nuclear fusion.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science