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  • In nuclear physics during beta- decay a  proton is converted to neutron,positron and a neutrino. How it’s possible for a proton to decay into more massive neutron. And it’s said that the decay is possible only when it’s inside the nucleus. so whether any other factors is involved in this decay?
  • We study in magnetism that Earth’s magnetism has 3 components namely declination Inclination,Horizontal component of Earth’s magnetic field. What is the cause of declination? Why it changes from place to place?

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