Water spraying out of a hose.

  1. So i noticed that when you put your hand really close to a spraying hose you don't really feel anything but when you move you hand further away it feels like it gets stronger. But how? I know that when the water leaves the hose the waters speed only drops not increases then why is it when i move my hand the further away it gets stronger? p.s. sorry for my English ;(
     
  2. jcsd
  3. davenn

    davenn 3,975
    Science Advisor
    Gold Member
    2014 Award

    I have always felt the water pressure stronger right at the nozzle
    and for the reasons you stated

    Dave
     
  4. I don't know if I can trust your sense of feeling. The only explanation I can come up with is gravity. Is the water stream falling down in an arc?
     
  5. A.T.

    A.T. 6,278
    Science Advisor
    Gold Member

    If you put your hand on the hole, the water flow stops (or slows down significantly). If you take it away it flows much faster.
     
  6. jet disperse with range. spreads over greater surface area of skin and tricks brain. also separation of jet into droplets same illusion.
     

  7. Thank you Gmar I was hoping for someone to confirm it.
     
  8. Just as we learn Physics you can learn to interpret the experiences your body is telling you. The constant steady pressure of a homogenous water jet vs the pulsing, throbbing impact of the same jet as it disperses and breaks into drops.

    This can be studied scientifically through biology or neuroscience or whatever domain it comes under but it also known intuitively by those with active lifestyles (who regularly have to experience and interpret physical sensations) and by those who look inward and study their mind, such as with practitioners of meditation and Yoga.
     
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