Question

Какую работу надо совершить для увеличения скорости электрона от 0,7с до 0,9 ?A. 0,46 МэВ В. 0,54 МэВ Д. 0,66 МэВБ. 0,5 МэВ Г. 0,6 МэВ

Answer 1

Подсказка для умных
Работа равна изменению кинетических энергий
A= Е2- E1   где Е= m*V^2/2
не забудьте вспомнить что масса электрона тоже зависит от скорости
После подстановки получаем А= MoC^2 ( 0,9^2/корень1-0,9^2 -0,7^2/корень1-0,7^2
MoC^2=0,511 Мэв масса покоя электрона табличное данное
Вычисление сами запарилась хрень набирать на клаве

Answer 2

Calculating the Work Required to Increase the Speed of an Electron

To calculate the work required to increase the speed of an electron from 0.7c to 0.9c, we can use the formula for kinetic energy:

Kinetic Energy (KE) = (γ - 1) * mc^2

Where: - γ (gamma) = 1 / sqrt(1 - v^2/c^2) - m = rest mass of the electron - c = speed of light - v = velocity of the electron

Let's calculate the kinetic energy at 0.7c and 0.9c and find the difference to determine the work required.

Calculating Kinetic Energy at 0.7c

At 0.7c, the kinetic energy can be calculated using the formula: KE = (γ - 1) * mc^2

Where: - v = 0.7c

Let's calculate the kinetic energy at 0.7c using the given values.

Calculating Kinetic Energy at 0.9c

At 0.9c, the kinetic energy can be calculated using the same formula: KE = (γ - 1) * mc^2

Where: - v = 0.9c

Let's calculate the kinetic energy at 0.9c using the given values.

Work Required to Increase Speed

To find the work required to increase the speed of the electron from 0.7c to 0.9c, we can find the difference in kinetic energy between the two speeds.

Let's calculate the work required based on the difference in kinetic energy between 0.7c and 0.9c.

I will now proceed with the calculations using the provided formulas and values.