The diffusion constant for oxygen diffusing through tissue is 
In a certain sample oxygen flows through the tissue at 
If the thickness of the tissue is doubled, then what is the rate of oxygen flow through the tissue?
A. 
B. 
C. 
D. 
E. 
C.
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Life emerged on Earth about a billion years after the solar system formed
Indicate whether the statement is true or false
Biologists have found that life on Earth can
A) survive over a wide range of environmental conditions B) only survive on the surface of the Earth C) survive over only a very narrow range of environmental conditions D) survive only in the presence of sunlight
Kim is in a spaceship moving past you at half the speed of light. Which of the following correctly describes how you will perceive each other's time?
A) You will say that Kim's time is running slow, and she will say that your time is running fast. B) You will say that Kim's time is running slow, and she will say that your time is running slow. C) You will say that Kim's time is running fast, and she will say that your time is running slow. D) You will both agree that time runs at the same rate for both of you.
When water freezes, it expands about nine percent. What would be the pressure increase inside your automobile engine block if the water in there froze? The bulk modulus of ice is 2.0 × 109 N/m2, and 1 atm= 1.01 × 105 N/m2.
A. 18 atm B. 360 atm C. 1100 atm D. 1600 atm E. 600 atm