A silicone polymer film of 4 mm thickness coats a flat, nonporous, inert surface. The polymer film is exposed to stagnant 100% O2 gas maintained at 1.5 atm. Oxygen gas is sparingly soluble in the silicone polymer film, with the solubility relationship given by Ca = S* Pa with S = 3:16 g mol O2/m3 silicone atm O2 at 298 K. Initially, there is 0.39 g mol O2/m3 uniformly dissolved in the film. The diffusion coefficient of O2 in silicone is 1 × 10-11 m2/s at 298 K. a. At a very short time of 10 s, O2 does not penetrate very far into the silicone polymer film. Under this physical situation, what is the flux of O2 into the surface of the silicone polymer film at this time? b. At a much longer time, the dissolved O2 concentration in the silicone polymer film at the polymer/inert interface is now 3.0 g mol/m3. How long will it take to achieve this concentration?

the correct answer is c.stops after infancy and childhood.

myelin is the substance of the central nervous system (cns) that insulates nerve cell axons to increase the speed at which nerve impulse travels. myelination is a process of myelin formation. this process occurs postnatally, begins in the embryo during the midst of early development and finishes after birth.

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an example of solubility is salt or sugar dissolving in water.

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science is the study of the nature and behavior of natural things and the knowledge that we obtain about them. a science is a particular branch of science such as physics, chemistry, or biology. physics is the best example of a science which has developed strong, abstract theories.

pseudoscience is a collection of beliefs or practices mistakenly regarded as being based on scientific method.

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explanation:

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