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How many excess electrons?

  • Thread starter jaydnul
  • Start date
  • #1
516
11
Homework Statement

A negatively charge balloon has 2.4 μC of charge. How many excess electrons are on this balloon? The elemental charge is 1.6e-19 C. Answer in units of electrons.

The attempt at a solution

I keep getting 1.5e13 electrons but the system is telling me it's wrong. I put it in many different forms and it still won't take it. (ex: 15000000000000)

Is there something that I'm missing here?
 

Answers and Replies

  • #2
34,070
9,957
I can confirm your answer, and I don't know which format the website wants if 1.5e13 and 15000000000000 are not accepted.
 
  • #3
516
11
Thanks anyways. I hate these online homework systems.
 
  • #4
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,798
1,666
How about 1.5e+13?
 
  • #5
gneill
Mentor
20,792
2,770
The problem says "Answer in units of electrons." Could it be as simple as adding the word "electrons" to the result?
 
  • #6
516
11
I tried 1.5e13, 1.5e+13, 15000000000000, and 1.5e13 electrons. All of those answers register as the same. It says "You have already tried this answer". Gonna chalk this up as an error on their part. I'm sure my prof will get extra points.

Thanks anyways guys...
 
  • #7
34,070
9,957
All of those answers register as the same. It says "You have already tried this answer".
Well, at least the code to analyze answers is good :D.
We all agree on the numerical value here, so the error is somewhere in the question or answer.
 

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