• EAMCET 2010 Questions (MCQ) on Surface Tension

    Updated: 2010-07-14 12:34:00
    : Pages Home About physicsplus The Physics Site for Success In science one tries to tell people , in such a way as to be understood by everyone , something that no one ever knew before . But in poetry , it's the exact opposite Paul A . M . Dirac Wednesday , July 14, 2010 EAMCET 2010 Questions MCQ on Surface Tension Today we will discuss two questions on surface tension which appeared in EAMCET 2010 question papers . The following multiple choice question appeared in EAMCET 2010 Engineering question : paper The excess pressure inside a spherical soap bubble of radius 1 cm is balance by a column of oil Sp . gravity 0.8 2 mm high . The surface tension of oil is 1 3.92 N m 2 0.0392 N m 3 0. 392 N m 4 0.00392 N m The excess pressure P insie a spherical bubble of radius r is given by P 4 T r

  • Multiple Choice Questions Involving Friction

    Updated: 2010-07-10 15:31:00
    : Pages Home About physicsplus The Physics Site for Success In science one tries to tell people , in such a way as to be understood by everyone , something that no one ever knew before . But in poetry , it's the exact opposite Paul A . M . Dirac Saturday , July 10, 2010 Multiple Choice Questions Involving Friction Any intelligent fool can make things bigger and more complex It takes a touch of genius and a lot of courage to move in the opposite . direction Albert Einstein Here are two questions MCQ on friction , which may easily tempt you to answer incorrectly 1 Three identical wooden blocks A , B and C , each of mass 1 kg , are placed on a rough horizontal surface as shown . A horizontal force F acts on the block A and the system of masses moves with an acceleration of 2 ms 2 If the

  • Metallic carbon nanotubes

    Updated: 2010-07-10 09:30:11
    Metallic carbon nanotubes show great promise for applications from microelectronics to power lines because of their ballistic transmission of electrons. But who knew magnets could stop those electrons in their tracks? Rice physicist Junichiro Kono and his team have been studying the Aharonov-Bohm effect -- the interaction between electrically charged particles and magnetic fields -- and how it relates to carbon nanotubes. While doing so, they came to the unexpected conclusion that magnetic fields can turn highly conductive nanotubes into semiconductors........

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