Mass Energy Relation

The relativistic mass of a particle moving with a speed of $2.0\times {10}^8{\mathrm{ms}}^{-1}$ in an accelerator is found to be $2.4\times {10}^{-26}\mathrm{kg}$. the rest mass of the particle is $\left(\mathrm{c}=3.0\times {10}^8{\mathrm{ms}}^{-1}\right)$

The momentum of a photon having energy ${10}^{-17} \mathrm{J}$ is 

If a star radiates energy at the rate of $5\times {10}^{20} \raisebox{1ex}{$\mathrm{J}$}\!\left/ \!\raisebox{-1ex}{$\sec $}\right.$. What is the rate at which its mass is decreasing?

For pair production phenomenon to accur to photon must have energy, greater than or equal to ______.

The basic theorem/principle used to obtain mass-energy relation is

An astronaut of rest has a heart rate of $65 \raisebox{1ex}{$\mathrm{beats}$}\!\left/ \!\raisebox{-1ex}{$\min $}\right.$. When the astronauts spaceship moves of a speed of $0.6\mathrm{C}$, her heart rate as measured by an earth observer will be: 

The binding energy of an electron to a proton is $13.6\mathrm{eV}$. The loss of mass in the formation of one atom of hydrogen is 

What will be the rest energy of an electron?

In relativistic case, as the velocity of the particle approaches the speed of light the kinetic energy approaches______.

Which of the following is Einstein's mass energy relation?

If the speed of light were $2/3$ of its present value, the energy released in a given atomic explosion will decrease by a factor of ___.

_____ and energy of the universe are conserved as a single entity according to the theory of relativity.

What is the kinetic energy of an electron in electronvolts with mass equal to double its rest mass ?