Recent content by kongieieie

  1. K

    How Does Surface Tension Help an Insect Escape Predators?

    Okay, so I looked up a couple of books and found that this phenomenon is explained by the Marangoni propulsion. I don't really know what it means. Can someone please explain the Marangoni Effect for me please?
  2. K

    How Does Surface Tension Help an Insect Escape Predators?

    A rare species of insect about 1.5mm in diameter floats fully submerged just beneath the surface of the water in lakes and ponds. When threatened, it responds to danger by exuding a noxious substance from its tail that changes the surface tension on the skin of its tail. As a result the...
  3. K

    Heisenberg Uncertainty Principle homework Question

    Nvm. I found a similar answer in another thread.
  4. K

    Heisenberg Uncertainty Principle homework Question

    Sorry about not using symbols but I haven't learned how to do that yet. 1. Homework Statement A woman is on a ladder of height H. She drops small rocks of mass m toward a point target on the floor. Show that according to the Heisenberg Uncertainty Principle, the average miss distance...
  5. K

    Cylinder Rotational Motion Question

    Problem solved. Thanks for the hint. :)
  6. K

    Cylinder Rotational Motion Question

    A sphere of radius a rests on top of a fixed rough circular cylinder of radius R which is lying with its principal axis horizontal. The sphere is disturbed and rolls, without any slipping, around the surface of the cylinder. Show from energy considerations that, if theta is the angle to the...
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