Recent content by paulina

  1. paulina

    thank you RonL ... but those are not my hand... :)

    thank you RonL ... but those are not my hand... :)
  2. paulina

    Why do solids maintain their individual identity when placed together?

    the intermolecular force of attraction is the cause for a solid to retain its rigidity... the intermolecular force acts mostly between same material... when you keep two different or same objects they do not merge because to create any bond you need to do some external work...this is the basic...
  3. paulina

    Measuring Acceleration of Falling Object: Mark Symbol?

    dont u think that there wouldn't be any need of using velocity, displacement and time and then calculate acceleration if there was any possible means of calculating acceleration just like that... please read the basic things about a physical quantity..."
  4. paulina

    What is the rate of gas expansion in a vacuum?

    assume yourself in the bag, and the gas in the bag is just expanding... the bag is expanding with the gas because it may be elastic... but you are not expanding because you are not elastic... rather your body while trying to expand itself just explode and you die... so accordingly the popping...
  5. paulina

    Silly Question [single large force versus several small forces]

    keep all the things aside and just compare the fact to this: if a slap you hard, you just feel the pain but you are intact... i slap you...many more times with the same force but you are just intact... and then after a while, all of a sudden, i punch u with my maximum ability... and the effect...
  6. paulina

    Net current in a solenoid or torroid

    thanks for the explanation...
  7. paulina

    Electrostatic Potential Energy with Constant Electric Field vs NonConstant Field

    Hereformore, don't u think that with the change in the electric field, there is also a change in the distance... so the net result of E*d*q can be constant. So why do u need to have a constant electric field to use the equation ?
  8. paulina

    Net current in a solenoid or torroid

    The notion of multiplying the current in each loop in a toroid or solenoid with the total number of loops in order to find out the net current in the toroid or solenoid is appearing a bit confusing. Why do we do this when we know the same current is flowing through each loop (just like water...
  9. paulina

    Magnetic field and refocusing paraxial electrons

    well there is no electric field, so no lorentz force... anyway thanks for the link...
  10. paulina

    Magnetic field and refocusing paraxial electrons

    (mv^2)/r = B.e.v r = m.v/B.e so, T = 2.pi.m/B.e now, p = v.T (p= pitch) p = 2.pi.m.v/ B.e i did not use Lorentz force now answer to my question please... :(
  11. paulina

    Refocusing of paraxial electron from electron gun

    W = qV (W=work, V=potential difference) (mv^2)/2 = qV (v=velocity) v = sqrt.(2qV/m) now, time period, T = 2.pi.m/Be so, d = v.T d = sqrt.(8.pi^2.m.V/B^2.e) :)
  12. paulina

    Magnetic field and refocusing paraxial electrons

    there was a question related to this which i although solved but could not find its true meaning... "In a region of space a uniform magnetic field Bis along the positive X-axis.Electrons are emitted from the origin with a speed 'v' at different angles.Show that the paraxial electrons are...
  13. paulina

    Magnetic field and refocusing paraxial electrons

    what is the technical meaning of refocusing paraxial electrons along the direction of magnetic field?
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