Kinetic energy equation


Moderators: Chem_Mod, Chem_Admin

abbydouglas1K
Posts: 65
Joined: Fri Sep 28, 2018 12:26 am

Kinetic energy equation

Postby abbydouglas1K » Thu Oct 11, 2018 11:26 pm

I know that to solve for the kinetic energy of a photon the equation is Ek=(1/2)mv^2 but where do we find the values of the mass of the specific electron ?

Joon Chang 2F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Kinetic energy equation

Postby Joon Chang 2F » Thu Oct 11, 2018 11:31 pm

The mass of an electron is 9.10938 × 10^-31 kilograms. This will probably be given on the constants page of the tests.

Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

Re: Kinetic energy equation

Postby Chloe Thorpe 1J » Thu Oct 11, 2018 11:35 pm

As far as I know, electrons have the same mass of 9.109 x 10^-31 kg.

sameeksha_panda_3h
Posts: 31
Joined: Fri Sep 28, 2018 12:25 am

Re: Kinetic energy equation

Postby sameeksha_panda_3h » Fri Oct 12, 2018 2:10 pm

Yeah don't worry too much about finding the mass of the electron specifically yourself. It should be on the formula card as it's a constant.

Alma Carrera 3C
Posts: 33
Joined: Fri Apr 06, 2018 11:02 am

Re: Kinetic energy equation

Postby Alma Carrera 3C » Fri Oct 12, 2018 2:18 pm

Yeah, Professor Lavelle said we would be given a sheet with all the constants so its not necessary to memorize them, but after using them over and over again it'll eventually stick to you.


Return to “Properties of Light”

Who is online

Users browsing this forum: No registered users and 1 guest