Question

Please solve the numerical problems of science,
Find the kinetic energy of an electron moving with a speed of 1.2×10⁶ m/s. mass of electron is 9.1×10⁻³¹ kg.

Answer 1

E=1/2 mv^2

m=9.1×10^-31 kg
v=1.2×10^6 m/s

E=6.55000000E−19