Kinetic energy

[RJ Lopez 2l]

When doing the hw, I saw the units for kinetic energy of an electron in a beam is eV. How do we get these units from the equation? I got joules instead.

[loganchun]

Hi, on the constants and equations sheet on Dr. Lavelle's website, it states that 1 eV = 1.602 x 10^-19 J. Use this to convert. Hope this helps.

[905744270]

This same thing happened to me. To convert from J, you have to divide by the number of Joules in 1 eV, which is 1.602x10^-19J.

I hope this helped!

[Ivan Huang Dis 3B]

if you look on the equations sheet there are usually conversions in the middle of the page that you can use. in this case 1 ev would be 1.602x10^-19J.

[Kayla Arellano 1K]

When doing the hw, I saw the units for kinetic energy of an electron in a beam is eV. How do we get these units from the equation? I got joules instead.

We would have to convert the units and one eV is equivalent to 1.602x10^-19 J.

[Meagan Kimbrell 1I]

It sometimes is confusing converting between units so make sure that you are DIVIDING your calculated joules value by the 1.602 x 10^-19 joules value.