Results 1 to 2 of 2

Math Help - exponential differencial equation

  1. #1
    Newbie
    Joined
    Jul 2008
    Posts
    14

    exponential differencial equation

    Coroner arrives at murder at 12:00 pm and body temp is 94.6, one hour later the temp is 93.4. The room temperature is 70 degrees. When was the murder committed?

    I am assuming its some form of exponential decay but I can't set the formula up can someone please help me work through this.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by helpless13 View Post
    Coroner arrives at murder at 12:00 pm and body temp is 94.6, one hour later the temp is 93.4. The room temperature is 70 degrees. When was the murder committed?

    I am assuming its some form of exponential decay but I can't set the formula up can someone please help me work through this.
    Newton's law of cooling:

    The rate of change of temprature is proportional to the difference between the ambient temprature and the current temprature:

    \frac{dT}{dt}=k(T_{amb}-T)

    RonL
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. differencial equation
    Posted in the Differential Equations Forum
    Replies: 2
    Last Post: January 10th 2009, 07:32 AM
  2. differencial equation
    Posted in the Calculus Forum
    Replies: 5
    Last Post: April 8th 2008, 11:03 AM
  3. differencial equation
    Posted in the Calculus Forum
    Replies: 3
    Last Post: March 28th 2008, 04:52 AM
  4. differencial equation
    Posted in the Calculus Forum
    Replies: 15
    Last Post: July 20th 2007, 04:16 PM
  5. differencial equation
    Posted in the Calculus Forum
    Replies: 3
    Last Post: June 26th 2007, 11:25 PM

Search Tags


/mathhelpforum @mathhelpforum