1.)A molecule of DNA (deoxyribonucleic acid) is 2.27 m long. The ends of the mol

Question

1.)A molecule of DNA (deoxyribonucleic acid) is 2.27 m 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 1.16% upon becoming charged. Determine the effective spring constant of the molecule.

(b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other.

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(c) What must be a particle's charge-to-mass ratio if the magnitude of the gravitational force between two of these particles is equal to the magnitude of electric force between them?
C/kg

magnitude N direction ---Select--- attractive repulsive 1.)A molecule of DNA (deoxyribonucleic acid) is 2.27 m 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 1.16% upon becoming charged. Determine the effective spring constant of the molecule. 2.)(a) Two protons in a molecule are 3.40 x 10^-10m apart. Find the electric force exerted by one proton on the other. (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (c) What must be a particle's charge-to-mass ratio if the magnitude of the gravitational force between two of these particles is equal to the magnitude of electric force between them?

Explanation / Answer

The ends of the molecules become singly ionized meaning the charge on both ends is e.

e = 1.6x10^-19 C

I will make an assumption that the force stays constant during compression.

F = kQ

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