# Electron/proton kinetic electric energy

• bocobuff
In summary, an electron starting from rest acquires 3.53keV of kinetic energy in moving from A to B. Based on conservation of energy, a proton moving from B to A would acquire the same amount of kinetic energy, 3.53keV.
bocobuff

## Homework Statement

an electron starting from rest acquires 3.53keV of kinetic energy in moving from A to B. how much kinetic energy would a proton acquire moving from B to A.

1/2mv2
me=9.11e-31 kg
mp=1.67e-29 kg
1eV=1.6e-19 J

## The Attempt at a Solution

conservation of energy, using potential energy = 0 at ending points and KE=3.53 at ending point so it should be equal to initial potential energy. But that's equal to q*E*s and i don't know E or s

nvm, it should just be the same as the electron due to conservation of energy
so =3.63 keV

I would like to clarify a few things about the question. First, it is important to note that kinetic energy is not a property of a particle, but rather a measure of its motion. Therefore, saying "kinetic energy of an electron/proton" is not entirely accurate. It would be more appropriate to say "kinetic energy acquired by an electron/proton."

Moving on to the solution, we can use the formula for kinetic energy, KE=1/2mv^2, to calculate the kinetic energy acquired by the proton. We know that the mass of a proton (mp) is much greater than the mass of an electron (me), which means that the proton would require less velocity to acquire the same amount of kinetic energy. Therefore, we can use the ratio of their masses to determine the kinetic energy acquired by the proton.

KE_proton = (mp/me) * KE_electron = (1.67e-29 kg / 9.11e-31 kg) * 3.53 keV = 64.6 keV

This means that the proton would acquire 64.6 keV of kinetic energy when moving from B to A. It is also worth noting that the direction of motion does not affect the amount of kinetic energy acquired by the particle.

## 1. What is "Electron/proton kinetic electric energy"?

"Electron/proton kinetic electric energy" refers to the electrical energy generated by the movement of electrons and protons in a system. It is a form of energy that is commonly harnessed in electronic devices and power systems.

## 2. How is "Electron/proton kinetic electric energy" generated?

"Electron/proton kinetic electric energy" is generated when electrons and protons are in motion. This can occur naturally, such as in lightning, or can be artificially created through mechanical or chemical means.

## 3. What is the difference between "Electron/proton kinetic electric energy" and other forms of energy?

The main difference between "Electron/proton kinetic electric energy" and other forms of energy is that it is specifically generated by the movement of electrons and protons. Other forms of energy, such as thermal or mechanical energy, may also involve the movement of particles, but they are not necessarily dependent on electron and proton movement.

## 4. How is "Electron/proton kinetic electric energy" measured?

"Electron/proton kinetic electric energy" is typically measured in joules (J), which is the standard unit of energy. This is calculated by multiplying the electric potential (in volts) by the amount of charge (in coulombs) that is being moved.

## 5. What are some real-world applications of "Electron/proton kinetic electric energy"?

"Electron/proton kinetic electric energy" has a wide range of applications, including powering electronic devices, lighting homes and buildings, and propelling electric vehicles. It is also used in industrial processes, such as welding and electroplating, and in medical devices, such as MRI machines.

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