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Two identical particles of mass 'm' and charge q are shot at each other from a very great distance with an
initial speed v. The distance of closest approach of these charges is

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An ideal gas with heat capacity at constant volume CV undergoes a quasistatic process described by PVα in a
P-V diagram, where α is a constant. The heat capacity of the gas during this process is given by- At time t = 0, a container has N0 radioactive atoms with a decay constant λ. In addition, c numbers of atoms
of the same type are being added to the container per unit time. How many atoms of this type are there at
t = T