What is the momentum of an electron rest mass m) whose kinetic energy equals its rest energy?
A) 0.5 mc kg·m/s
B) kg·m/s
C) kg·m/s
D) kg·m/s
E) Kg·m/s

Question

What is the momentum of an electron rest mass m) whose kinetic energy equals its rest energy?
A) 0.5 mc kg·m/s 
B) kg·m/s 
C) kg·m/s 
D) kg·m/s 
E) Kg·m/s

Quizplus · Accepted Answer

The momentum of an object can be found using the formula p = mv, where p is momentum, m is mass, and v is velocity. Since the electron's kinetic energy equals its rest energy, we know that the velocity of the electron is equal to the speed of light (c). Therefore, its momentum can be calculated as p = mc, where m is the rest mass of the electron. Plugging in the values, we get p = (9.11 x 10^-31 kg)(3 x 10^8 m/s) = 2.73 x 10^-22 kg·m/s, which is equivalent to 11eb1367_50fa_e09d_8021_c76690e04186_TB7291_11 kg·m/s in scientific notation. Therefore, the correct answer is B.

What Is the Momentum of an Electron Rest Mass M)