Results 1 to 1 of 1

Math Help - Exponentail Decay Problem- any help useful

  1. #1
    Junior Member
    Joined
    Jul 2012
    From
    Manchester
    Posts
    30

    Exponentail Decay Problem- any help useful

    The police discover a murder victim at 5:15 a.m. They measure the body
    temperature of the victim and record it as 30C. Hercule Marple arrives on the
    scene of the crime 30 minutes later and measures the body temperature again.
    He records it as 27C.
    The temperature of the room is recorded as 15C and assumed to be constant.
    Hercule Marple, knowing that normal body temperature is 37C, wants to
    estimate the time of death of the victim.
    If the cooling process is modelled by the equation
    q =q 0e^kt , where q is the
    excess
    temperature (body temperature minus room temperature), and 0 q and
    k
    are constants, estimate the time of death.
    (ii) When Miss Poirot arrives and investigates closely, she finds that the police and
    Hercule have been sloppy recording the figures. The real measurements should
    have been 29.6C at 5:14am and 27.4C at 5:46am, and the room temperature
    was really 14.6C. How far out is the original estimate of the time of death?
    Last edited by Magical; July 19th 2012 at 07:47 PM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Exponentail graowth and decay
    Posted in the Advanced Applied Math Forum
    Replies: 0
    Last Post: July 7th 2012, 09:40 PM
  2. Decay of a Decay. Is the diff eqn correct
    Posted in the Differential Equations Forum
    Replies: 2
    Last Post: July 29th 2010, 02:40 AM
  3. Decay rates in exponential decay
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: December 21st 2009, 06:20 AM
  4. exponentail growth
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: December 3rd 2008, 07:24 PM
  5. exponentail
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: July 8th 2007, 02:00 PM

Search Tags


/mathhelpforum @mathhelpforum