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: Heat Transfer

  1. Jan 8, 2007 #1
    Does warm water rise or fall in cold weather?

    I think it falls

    Does it have to do with convection???????
     
  2. jcsd
  3. Jan 8, 2007 #2

    russ_watters

    User Avatar

    Staff: Mentor

    The question makes no sense. "Weather" implies the atmosphere and water is a liquid, so water falls in the atmosphere regardless of if it is warm or cold. Can you provide some context to the question?
     
  4. Jan 8, 2007 #3

    LeonhardEuler

    User Avatar
    Gold Member

    Above 4°C, water gets denser as it cools. This means that warmer water rises under these conditions. Below 4°C, water becomes actually becomes less dense as it cools. Under those conditions warm water will fall as you guessed.
     
  5. Jan 8, 2007 #4

    Gokul43201

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Are you reading "weather" as 'water'?
     
  6. Jan 8, 2007 #5

    LeonhardEuler

    User Avatar
    Gold Member

    The situation I assumed he was talking about was you have some water outdoors like a lake or something, and the water is at a temperature close to the air, but it isn't completely uniform. It's the only way it makes sense. I know they sometimes give ocean temperatures in weather reports, so maybe the question is actually legitimate.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook