Mass-Energy Relation

The mass of an electron is 9.11xx10^(-31) kg and the velocity of light is 3.00xx10^(8)ms^(-1) . Calculate the energy of the electron using Einstein's mass energy relation E=mc^(2) , correct ot the significant figures?

Einstein's mass - energy relation emerging out of his famous theory of relativity relates mass (m) to energy (E ) as E = mc^2, where c is speed of light in vacuum. At the nuclear level, the magnitudes of energy are vary small. The energy at nuclear level is usually measured in MeV, where 1 MeV = 1.6 xx 10^(-13) J , the masses are measured in unified mass unit (u) where 1 u = 1.67xx10^(-27)kg. (a) Show that the energy equivalent of 1u is 931.5 MeV. (b) A student writes the relation as 1 u = 931.5 MeV. The teacher points out that the relation is dimensionally incorrect. Write the correct relation.

Write down the Einstein's mass-energy equivalence relation, explaining the meaning of each symbol used in it.

If mass-energy equivalence is taken into account , when water is cooled to form ice, the mass of water should :-(Note: The mass energy of an object is the energy equivalent of its mass , as given by E= mc^(2) , where m= mass of object & c = speed of light)

What is the relation between rate constant and activation energy of a reaction?

Heavy radioactive nucleus decay through alpha- decay also. Consider a radioactive nucleus x. It spontaneously undergoes decay at rest resulting in the formation of a daughter nucleus y and the emission of an alpha- particle. The radioactive reaction can be given by x rarr y + alpha However , the nucleus y and the alpha- particle will be in motion. Then a natural question arises that what provides kinetic energy to the radioactive products. In fact, the difference of masses of the decaying nucleus and the decay products provides for the energy that is shared by the daughter nucleus and the alpha- particle as kinetic energy . We know that Einstein's mass-energy equivalence relation E = m c^(2) . Let m_(x), m_(y) and m_(alpha) be the masses of the parent nucleus x, the daughter nucleus y and alpha- particle respectively. Also the kinetic energy of alpha- particle just after the decay is E_(0) . Assuming all motion of to be non-relativistic. Which of the following is correct ?

If mass-energy equivalence is taken into account, when water is cooled to from ice, the mass of water should

Assertion : In a nuclear process mass gets converted into energy. Reason : According to Einstein's mass energy equivalence relation, mass m is equivalent to energy E, given by the relation E = mc^(2) where c is the speed of light in vacuum.

How is energy related to biomass?