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Finding the mass after gaining elctrons

  • Thread starter MRGE
  • Start date
  • #1
10
0

Homework Statement


A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -73 µC. How many excess electrons does this person get?


Homework Equations



so i did 73x10^-6 / 1.602x10^19 and i got 4.5x10^14

but one of the questions is By how much does her mass increase?

The Attempt at a Solution



I have no idea how i would go about and in finding this.
 

Answers and Replies

  • #2
Astronuc
Staff Emeritus
Science Advisor
18,704
1,718
One has the number of electrons. Now what is the rest mass of an electron? Use the two numbers to determine the total mass of electrons gained.
 

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