Question

Найти скорость электрона, имеющего кинетическую энергию 5 эВ

Answer 1

E=m*V^2/2
V=sqrt(2*E/m)=sqrt(2*5*1,6*10^-19/9,1*10^-31)=1,33*10^6 м/с

Answer 2

Calculating the Speed of an Electron with Kinetic Energy of 5 eV

To calculate the speed of an electron with a kinetic energy of 5 eV, we can use the following formula:

Kinetic energy (KE) = 0.5 * mass * velocity^2

Where: - KE = 5 eV - Mass of an electron = 9.10938356 × 10^-31 kilograms

We can rearrange the formula to solve for velocity:

Velocity = sqrt((2 * KE) / mass)

Let's calculate the velocity using the given kinetic energy and the mass of an electron.

Calculating the velocity: ``` KE = 5 eV Mass of an electron = 9.10938356 × 10^-31 kilograms

Velocity = sqrt((2 * 5 eV * 1.60218 × 10^-19 joules/eV) / (9.10938356 × 10^-31 kilograms)) ```

Result

The speed of the electron with a kinetic energy of 5 eV is approximately 1.21 x 10^6 m/s.