electric circuits

Discussion in 'Homework Help' started by fatima92, Feb 2, 2013.

  1. fatima92

    Thread Starter New Member

    Feb 2, 2013
    1
    0
    hi
    can u please help in this question ?
    The manufacturer of a 1.5 V D flashlight battery says that the battery will deliver 9 mA for 40 continuous hours. During that time the voltage will drop from 1.5 V to 1.0 V. Assume the drop in voltage is linear with time.

    How much energy does the battery deliver in this 40 h interval
     
  2. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    What have you done so far?

    What units are used to state battery capacity?
     
  3. WBahn

    Moderator

    Mar 31, 2012
    17,757
    4,800
    What are the relationships between energy, power, voltage, and current?

    Do you have any calculus background? It's not needed for this problem, but it will help us know how best to discuss the concepts.
     
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