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In thermodynamics there is the compressibility \begin{equation} \kappa = - \frac{1}{V_\text{mol}}\left( \frac{\partial V_\text{mol}}{\partial p} \right)_T \end{equation} in order to describe how well one can compress a substance. For small (!) changes of pressure $\Delta p$ (while you keep temperature constant), $\Delta p \kappa$ tells you by which ...


In a nuclear fission, the heavy,unstable and radioactive uranium nucleus is hit by a fast moving neutron having kinetic energy in excess of 5 MeV. The process continues with subsequent emission of highly-energised neutrons and other fragments. This suggests that a very high temperature and a high pressure is required for sustaining the process. So, what ...

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