A molecule of DNA (deoxyribonucleic acid) is 2.19 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 1.20% upon becoming charged. Determine the effective spring constant of the molecule.
answer in N/M
1
Expert's answer
2017-06-14T08:24:10-0400
Data: L=2.19*〖10〗^(-6) m,ε=1.2% As its said that molecule is ionized slightly: we can assume that both charges equals to elementary charge: e=1.6*〖10〗^(-19)
The electrical force is compensated by force of elastisity:
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