Calculate the kinetic energy in J of an electron moving at 6.00 × 10⁶ m/s. The mass of an electron is 9.11 × 10^-28g. A)4.98 × 10^-48 J B)3.28 × 10^-¹⁴ J C)1.64 × 10^-17 J D)2.49 × 10^-48 J E)6.56 × 10^-¹⁴ J

Question

Quizplus · Accepted Answer

We can use the formula for kinetic energy:

KE = (1/2)mv^2

where m is the mass of the electron and v is its velocity.

Substituting the given values, we get:

KE = (1/2)(9.11 × 10^-31 kg)(6.00 × 10^16 m/s)^2
   = 1.64 × 10^-17 J

Therefore, the best choice is C, which matches this result.

Calculate the Kinetic Energy in J of an Electron Moving