Respuesta :
Answer: 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.
[tex]K.E=\frac{1mv^2}{2}[/tex]
K.E= kinetic energy = [tex]0.991\times 10^{-19}J[/tex]
m= mass of an electron = [tex]9.109\times 10^{-31}kg[/tex]
v= velocity of object = ?
Putting in the values in the equation:
[tex]0.991\times 10^{-19}J=\frac{1\times 9.109\times 10^{-31}kg\times v^2}{2}[/tex]
[tex]v=466462m/s[/tex]
The speed necessary for the electron to have this energy is 466462 m/s
Answer:
4.66 × 10^5 m/s.
Explanation:
Given:
Mass of the electron, m = 9.109 × 10^−31 kg
KE = 0.991 × 10^−19 J.
Kinetic energy, KE = 1/2 × m × v^2
v = sqrt((2 × KE)/m)
= sqrt(2.176 × 10^11)
= 4.66 × 10^5 m/s.
