A certain moving electron has a kinetic energy of 0.991 × 10−19 J. Calculate the speed necessary for the electron to have this energy. The mass of an electron is 9.109 × 10−31 kg. Answer in units of m/s.

The speed necessary for the electron to have this energy is 466462 m/s

Explanation:

Kinetic energy is the energy posessed by an object by virtue of its motion.

K.E= kinetic energy =

m= mass of an electron =

v= velocity of object = ?

Putting in the values in the equation:

The speed necessary for the electron to have this energy is 466462 m/s

i think the answer would be b