Question

An alpha particle (mass=6.68x10^-27kg)is emitted from a radioactive nucleus with an energy of 5.00MeV. How fast is the alpha particle moving in m/s? (1 MeV= 1.6x10^-13J).

I don't know how to start to solve this problem

A.2.40x10^7 m/s
B.1.55x10^7 m/s
C.3.70x10^6 m/s
D.1.85x10^6 m/s
E.4.90x10^5 m/s

14 years ago