The combined effect of the water molecules surrounding the DNA is to weaken the electric field of the DNA by a constant k. For water, this dielectric constant is k = 80. The magnitude of the electric field from the DNA some distance r away from it is then E(r) = What is the electrostatic force on a Cl- ion that is placed 0.5 nm away from 2κλ Kr the DNA? .
The combined effect of the water molecules surrounding the DNA is to weaken the electric field of the DNA by a constant k. For water, this dielectric constant is k = 80. The magnitude of the electric field from the DNA some distance r away from it is then E(r) = What is the electrostatic force on a Cl- ion that is placed 0.5 nm away from 2κλ Kr the DNA? .
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Transcribed Image Text:The combined effect of the water molecules surrounding the DNA is to weaken the
electric field of the DNA by a constant K. For water, this dielectric constant is k = 80.
The magnitude of the electric field from the DNA some distance r away from it is then
What is the electrostatic force on a Cl- ion that is placed 0.5 nm away from
2kλ
E(r)
Kr
the DNA?
=
Transcribed Image Text:2
DNA
CI
-
a
(water)
A. 7.25 pN perpendicular to the direction of the electric field of the DNA
B. 7.25 pN away from the DNA
C. 7.25 pN toward the DNA
D. 7.25 nN away from the DNA
E. 7.25 nN toward the DNA
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