posted by Jan .
A molecule of DNA (deoxyribonucleic acid) is 2.03 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.13% upon becoming charged. Determine the effective spring constant of the molecule.
calculate force (proportional to Q1*Q2/distance^2)
force = k (2.03*10^-6)(.0113)