Oxygen reaches the veinless cornea of the eye by diffusing through its tear layer, which is 0.60-mm thick. How long does it take the average oxygen molecule to do this? The diffusion constant of oxygen through water is 1.0 x 10⁹ m²/s. Hint 1. Treat this as a one-dimensional problem. 2. Convert to minutes. 3. Think about the length of the time interval you have calculated. Enter to 2 significant figures Average time taken by O₂ molecule through the tear layer = 30 minutes As a comparison, calculate the time it takes for oxygen to diffuse through a cell membrane about 10 nm thick. Note: Enter time in seconds instead of minutes. Enter to 2 significant figures Average time taken by O₂ molecule through the cell membrane = 0.5 S

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Oxygen reaches the veinless cornea of the eye by diffusing through its tear layer, which is 0.60-mm
thick. How long does it take the average oxygen molecule to do this? The diffusion constant of oxygen
through water is 1.0 x 10-⁹ m²/s.
Hint
1. Treat this as a one-dimensional problem.
2. Convert to minutes.
3. Think about the length of the time interval you have calculated.
Enter to 2 significant figures
Average time taken by O₂ molecule through the tear layer = 30
minutes
As a comparison, calculate the time it takes for oxygen to diffuse through a cell membrane about 10
nm thick.
Note: Enter time in seconds instead of minutes.
Enter to 2 significant figures
Average time taken by O₂ molecule through the cell membrane = 0.5
S
Transcribed Image Text:Oxygen reaches the veinless cornea of the eye by diffusing through its tear layer, which is 0.60-mm thick. How long does it take the average oxygen molecule to do this? The diffusion constant of oxygen through water is 1.0 x 10-⁹ m²/s. Hint 1. Treat this as a one-dimensional problem. 2. Convert to minutes. 3. Think about the length of the time interval you have calculated. Enter to 2 significant figures Average time taken by O₂ molecule through the tear layer = 30 minutes As a comparison, calculate the time it takes for oxygen to diffuse through a cell membrane about 10 nm thick. Note: Enter time in seconds instead of minutes. Enter to 2 significant figures Average time taken by O₂ molecule through the cell membrane = 0.5 S
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