Rest Mass/Energy and Electron Volts Flashcards
1
Q
What is rest mass?
A
(mo) is the mass of a stationary object
2
Q
Why is rest mass the smallest mass an object has?
A
it is the smallest mass because mass increases with speed
3
Q
What is the Mo of a photon?
A
0
4
Q
What is rest energy and what is its equation?
A
(Eo), energy of a stationary object
Eo = mo c^2
5
Q
What is an electron volt?
A
equal to the work done on an electron that is moving through a pd of 1v
6
Q
Why do we use electron volts instead of joules when dealing with the energy of particles?
A
because the energy of a particle is much smaller than a joule it makes our working neater to use electron volts
7
Q
What does 1ev equate to?
A
1.6x10^19J = charge of a proton
8
Q
How do we find the number of electron volts?
A
divide the joules by 1.6 x 10 ^19
