1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Another one

  1. Nov 22, 2006 #1
    An automobile cooling system holds 18 L of water. How much heat does it absorb if its temperature rises from 20oC to 90oC?

    V= 18 L=0.018 m3
    m=pV=(1.0*103 kg/ m3 )(0.018 m3 )= 18 kg

    Q=mcT=(18 kg)(4186 J/kg*Co)( 90o-20o)= 5,274,360 J

    The answer in the book says it should be 4.7*10^6, but I don't know how they derived to that answer. Any help
  2. jcsd
  3. Nov 22, 2006 #2
    Any help from anybody?
  4. Nov 23, 2006 #3
    Are you sure that is all the information given? Your calculations seems right to me.
  5. Nov 23, 2006 #4
    Yes that was all that was given...I thought I was correct also, maybe the book made a mistake...it has been known to happen. Thanks for the help!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook