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NUCLEAR PHYSICS
     
1. How much energy could (in principle) be obtained from 1u of mass?
    Answer first in J then in MeV.
     
2.   A proton has a mass of 1.0078u and a neutron has a mass of 1.0078u.
A helium nucleus has a mass of 4.0026u.
    Calculate the energy given out when a helium nucleus is formed.
    Answer in MeV.
     
3.   The fission of a uranium 235 nucleus into barium and krypton produces about 200MeV of energy.
    Find the mass loss during this reaction.
    Answer first in kg then in u.
     
4.   The neutron was discovered when beryllium was bombarded with a particles.
    Complete the following equation which describes the reaction.
   
     
5.   A uranium 235 nucleus can decay into a thorium (Th) nucleus by the emission of an particle.
    Write an equation which describes this decay.
     
6.   Complete the following equation which describes a possible nuclear fission process.
     
     
7.    A neptunium nucleus (Np 239) can decay into a plutonium nucleus (Pu 239) and a b particle.
    Write an equation to describe this reaction.  
     
 
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