Homework Help: Physics

Posted by Eman on Wednesday, October 12, 2011 at 5:06pm.

Stretching DNA.
With its double-helix structure, DNA is coiled like a spring. A biophysicist grabs the ends of a DNA strand with optical tweezers and stretches it 26痠 producing 1.2pN- tension in the strand.

What's the DNA's spring constant?

Physics - Erica, Wednesday, February 29, 2012 at 6:18am
F=kx
F (tension of the strand)=1.2 pN
x (displacement)=26 痠

Solve for k, which is the spring constant. You may need to convert your unit measurements, as your answer's unit will come out in pN/痠 instead of the standard N/m.

(I know this is a little late, but I wanted to post it up, in case anyone else needed it.)

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