[領域]普物電學                             (題目相關領域)

[來源] 課本習題                            (課本習題、考古題、參考書...)

[題目]The two strands of the helix-shaped DNA molecule(the genetic materizl
 in living cells)are held together by electrostatic force. Assume that the
 net average charge indicated on H and N atoms is effectively 0.2e, and on
the indicated C and O atoms is 0.4e, that atoms on each molecule are separated
 by 1×10^(-10)m, and that all relevant angles 120. Estimate the net force
between (a) a thymine and an adenine; and (b) a cytosine and a guanine.
(c)Estimate the total force for a DNA molecule containing 10^5 pairs of such
molecules.
(題目的圖→http://0rz.tw/542xr)

[瓶頸] 題目有看沒有懂，不知道到底是要求哪個距離/___\
　　　然後我也不知道正確答案，無法逆推。


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