1. An unhealthy diet can cause blockages in the blood vessels that restrict the

Question

1. An unhealthy diet can cause blockages in the blood vessels that restrict the flow of blood. If the blockage gets severe enough it can lead to collapse of the blood vessel. Explain why this is using concepts of fluid physics covered in this class.?

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9.) (8 pts) At this very moment you are sitting in a room that is 10.5m x 10.5m x 3.0m. How much heat would have to be removed to turn all the air in this room into liquid? Assume the air is transferred into a giant balloon beforehand so that it may collapse while it cools. At right is a table of constants, some of which are relevant. Co for air C, for air c for liquid air Ly for air L, for air Boiling point of air Melting point of air-210°C Atomic mass of air | 28 g/mol Density of air at STP 1.28 kg/m3 Room temperature 20° C 330.75 29.1 J/mol/K 20.8 J/mol/K 2042 J/kg/K 199,000 J/kg 26,000 J/kg -196°C 0,022 k nol

Explanation / Answer

1)

In a normal circulatory system, the volume of blood returning to the heart each minute is approximately equal to the volume that is pumped out each minute . Because of this, the velocity of blood flow across each level of the circulatory system is primarily determined by the total cross-sectional area of that level. This is mathematically expressed by the following equation:

v = Q/A

So, if blockage gets severe enough it will lead to decrease in flow of blood Q. So, automatically cross sectional area of artery decrease so, blood vessel collapse .

2) mass of air = 1.28*10.5*10.5*3

                         = 423.36 kg

=> amount of heat removed = 423.36*2042*230

                                              = 1.988*108 J

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