Electric Charge and Electric Field (id: d24d4176a)

本题目来源于试卷: Electric Charge and Electric Field，类别为 IB物理学

[填空题]
The two strands of the helix-shaped cs74 0hy kgou0vg3 1bnDNA molecule are hz6(q6:o ydi3o x h/ftleld together by electrostatic forces as shown in Fig. 16–44. Assume that the net average charge (due to electron sharing) indicated on H and N atoms is 0.2e and on the indicated C and O atoms is 0.4e. Astyfo6o zix/6: ( d3hlqsume also that atoms on each molecule are separated by $1.0\times {10}^{-10}m$. Estimate the net force between
(a) a thymine and an adenine;    $\times {10}^{-10}N$
(b) a cytosine and a guanine. For each bond (red dots) consider only the three atoms in a line (two atoms on one molecule, one atom on the other).    $\times {10}^{-10}N$
(c) Estimate the total force for a DNA molecule containing ${10}^5$ pairs of such molecules.    $\times {10}^{-5}N$

参考答案:
空格1: 4.623±2%  空格2: 7.116±2%  空格3: 5.85±2% 


本题详细解析:

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