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P. 4165. Find the mass of that steel wire, which stores elastic potential energy of 10 J when it is expanded. The tensile strength of steal is 900 MPa. Its Young modulus is 210 GPa.

(4 points)

Deadline expired on 11 June 2009.

Statistics on problem P. 4165.
 91 students sent a solution. 4 points: 74 students. 3 points: 3 students. 2 points: 6 students. 1 point: 5 students. Unfair, not evaluated: 3 solutions.

• Problems in Physics of KöMaL, May 2009

•  Támogatóink: Morgan Stanley