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What you see when watching waves - The Galveston County Daily News: Columns

October 24, 2016

What you see when watching waves

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  • IHOG posted at 11:11 pm on Thu, May 29, 2014.

    IHOG Posts: 2486

    A wave is an energy package traveling across the water. Where did the energy originate?
    Water is heaver than air. Why is dry air heavier than wet air?

  • oledad posted at 5:54 am on Fri, May 30, 2014.

    oledad Posts: 74

    the internet is great


  • Joe Concienne posted at 10:24 am on Fri, May 30, 2014.

    Joe Concienne Posts: 36

    IHOG: the energy usually comes from the wind. As wind blows across the water surface it start to rough it up and starts waves. How big the waves get depends on how hard , how long and the distance over which it blows. Another less frequent cause of big waves are underwater earthquakes.

    Good question, wet air seems heavier than dry air but it is not. Remember air is mostly nitrogen the molecular weight of dry air is about 29 lbs per lb-mole. The molecular weight of water vapor is 18 lbs. per lb-mole. Thus a mixture of water vapor and dry air is lighter than pure dry air at the same temperature and pressure.

    My guess is that we equate wet air with fog or misty conditions.However fog is a mixture of liquid and vapor and liquid water is much more dense than water vapor. Thus fog feels heavier than wet air which is all vapor.

    Thanks for commenting

  • gecroix posted at 1:43 pm on Fri, May 30, 2014.

    gecroix Posts: 6261

    Another interesting article.
    If only you'd go to DC and give those characters up there lessons on saying things in a factual, comprehensible manner...[wink]