No Service 8:31 PM webwork.phys.yorku.ca (1 point) THE PROBLEM A piece of DNA is

Question

No Service 8:31 PM webwork.phys.yorku.ca (1 point) THE PROBLEM A piece of DNA is observed to stretch by d=28 m when a mass of m=0.12 ng is hanging from it. How far must you stretch a piece of DNA to store E-20 aJ of energy? PAPER SOLUTION Solve the problem on paper first, including all four IDEA steps. You will become a better physicist that way! Have you finished your paper solution already? o yes no INTERPRET Identify all of the true statements. A. DNA obeys Hooke's law exactly B. We do not need Hooke's law for this physics problem C. Hooke's law is only valid

Explanation / Answer

Here L = sqrt (2 E/(mg/d))

= sqrt (2*20e-18 /(0.12e-12*9.8/28e-6))

= 3.086e-5 m

=30.86 um

E = 20e-18/1.6e-19

= 125 eV answer

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