Young's Modulus Physics Help due soon please!!?

Tyron J

New member
I can't figure this last answer out and it's due at 12 please help and show me how you figured it out. thanks.

If a force is exerted on two ends of a Newt chromosome, it will stretch. The data here represents the applied force in nano-Newtons as a function of the change in length of the chromosome. The original, unstretched length of the chromosome represented in this graph is 14.9 μm.

Presume that the chromosome shape can be approximated by a long cylinder with a diameter of 1.60 μm. Throughout the problem be very careful with units and prefixes. If we model this chromosome as a spring, what is its spring constant? I found that to be 6.65×10-5 N/m which is correct.

What I can't find is the value for Young's Modulus.

Please help full points thanks!
Thank you very much!!! that worked. I'll give you the stars as soon as Yahoo allows me to!
 
Use the standard formula for an effective spring constant of a prismatic member:

k = E*A/L

where E is Young's modulus, A is cross sectional area, L is length.

You can derive this from stress, strain, and Young's modulus definitions.

A will equal Pi*d^2/4, if it is approximated as a cylinder.
 
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