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GalleTF
06.05.2020 •
Mathematics
A scientist is investigating a cell. The cell has a membrane thickness of 7.×10−8 m and has a surface area of 4.×10−8. The initial concentration inside the cell is n(0)=0.6 M, and the scientist later observes that an(0.2)=0.77 M. Assume that the concentration outside the cell is 1. M and that it will not change appreciably as the compound in the cell undergoes diffusion. What is the value of the parameter k in the equation for Fick's Law
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Ответ:
Step-by-step explanation:
we will begin with a step by step process to make this as concise as possible.
From our basic knowledge of Fick's Law of diffusion
we have that;
dm/dt = KA(m₀-m) / x
given that m = concentration at t
m₀ = outside concentration (1)
A = area (4 *10-8)
x = thickness (7 *10-8)
therefore we have that from the expression;
dm/dt = (K *4 *10-8 (1 -m)) / 7 *10-8
dm/1-m = 0.57 Kdt
integrating between limits
∫dm/1-m (0.2 to 0.77) = 0.57 ∫ dt (0 to 0.6)
Ответ:
answer: (c) m∠qpo + (2x + 16)° = 180°
step-by-step explanation:
the opposite angles of a quadrilateral are supplementary.
so, ∠o + ∠q = 180° and ∠p + ∠r = 180°
since ∠r = 2x + 16°, we can use substitution as follows:
∠p + ∠r = 180°
∠p + (2x + 16)° = 180°