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Homework Help: What's the formula?

  1. Dec 12, 2007 #1
    I'm trying to figure out the answer to a homework problem, but I just don't know the formula. :|
    I was going to explain it, but I figure a pic is easier.

    http://img230.imageshack.us/img230/15/el1ko7.th.jpg [Broken]

    Now, I think you start with T = RC? With that, I get 1 sec. Then I divide each of the times by that? Rrrrrr! Can someone tell me what formula to use or give me a clue, at least? :(
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Dec 12, 2007 #2

    Doc Al

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    Staff: Mentor

    Last edited by a moderator: Apr 23, 2017
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