Kinetic Energy from Point A to B: Electron Volts

[gekdvb]

point a is at a potentiall of +290...point b is at potential of -220...helium nucleus contains 2 neutrons and 2 protons...neutrons are electrically neutral...what kinetic energy does particle have after accelerating from rest at point a to b...in electron volts

 

[Hyperreality]

You should really show some working...

I think this is how you should go about it.

First, E = K + U. Then use conservation of energy, to find delta K, then use the kinetic energy work theorem.

 

[Andrew Mason]

point a is at a potentiall of +290...point b is at potential of -220...helium nucleus contains 2 neutrons and 2 protons...neutrons are electrically neutral...what kinetic energy does particle have after accelerating from rest at point a to b...in electron volts

The potential difference between a and b is the energy/unit charge: ie. the energy that a unit charge gains in moving from a to b. The energy that a charge of e gains in moving through a potential difference of 1 volt is 1 eV. So what is the energy that a +2e charge gains in moving from a to b?

AM

 

[christinono]

Look at the post called "Electric Potential & Kinetic Energy " (just above yours). The methods for solving the problems are very similar...

 

[apchemstudent]

point a is at a potentiall of +290...point b is at potential of -220...helium nucleus contains 2 neutrons and 2 protons...neutrons are electrically neutral...what kinetic energy does particle have after accelerating from rest at point a to b...in electron volts

take a look at this thread

https://www.physicsforums.com/showthread.php?t=61631