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- 3.) A beam of electrons with energy 250 MeV is elastically scattered through an angle of 10° by a heavy nucleus that is at rest. It is found that the differential cross-section is 65% of that expected for scattering from a point-nucleus. Estimate the root mean square radius of the nucleus. Neglect the recoil of the nucleus and use the rest mass of the electron as 0.511 MeV/c².X-rays have a wavelength of 0.71 A)) scattered by a piece of carbon at a right angle, then analyzed by a spectrometer, the kinetic energy of the returning electron is: - 772 ev -672 ev - 872 ev - 572 ev31)
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