# Physics

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Estimate the total binding energy for copper.
550 MeV

Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons.
E= in Joules

• Physics -

Number of atoms is
N= N(A)•m/μ =
=6.022•10²³•0.003/63.5•10⁻³=2.85•10²².
Number of nucleons (protons+neutrons) =
=2.85•10²²•63=1.8•10²⁴.
Energy = 1.8•10²⁴•550•10⁶•1.6•10⁻¹⁹ =1.58•10⁸ J

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