a parallel plate capacitor is filled with a layer of distilled water of 0.3cm tihck. The dipole moment of a water molecule is 6.1*10^(-30) C.M. Assume that the dipole moments of the water molecules are all perfectly aligned with the electric field. What is the surface charge density of bound...
1)two different formulas for electric field is
a)U=(1/2)Q1V1+(1/2)Q2V2+...
b)U=\int \frac{1}{2}\epsilon.E^2dv
Using these how could we perform an experiment to test where the energy located?
2)Since the electric energy density is never negative, how can the mutual electric potential of...
I read smt similar but not by hitting the wall...As far as I remember the book says that a car may cross through the garage door(Of course it is a very small possibility).It was a possibility let by quantum theory.Well, I was 14 or 15, now I study physics but I haven't taken quantum theory...
What is so called SELF ENERGY? I know the explanation that it is the energy that a point charge has when it is by itself,at a large distance from other charges. In textbook (ohanian) says that it takes work to assemble the point charge out of infinitesimal pieces of charge.The energy needed to...
I assume that each floor is 2.5 meters high, then negleting the force of the air under the elevator(well, i don't known whether it is possible to neglect), you'll hit ground with a speed of 25 m/s.As far as I know human body can resist 25G downward. then if it takes longer then 0.11 seconds...
the absence of electrostatic fields in closed conducting cavities is proved by using the idea that the electrostatic field as a conservative field:
0=\oint E.dl
this equation implies that a field line can never form a closed loop.
In my opinion this cannot be applied to gravitational...
1}If the electric field is zero in some region, must the potential also be zero?An example?
2}Give an example of a conductor that is not an equipotential.Is this conductor in electrostatic equilibrium?
3)If a high voltage cable falls on top of your automobile, will you probably be safest...
as you all now torque in rotational motion has similarity with force in translational motion. but torque has the same unit as energy.it seems to me that there is a problem. Any explanation you have? (please ssmt different than " they are defined that way!"
yes it is clear i made a fatal error. in case of problem 1 a)if the density of the universe is lower than the critical value...
Now the universe will keep expanding...I think that the end of the universe won't be different in both cases.When I asked for a hint about the question to the...
some HW question.Thanks for your help...
1)decribe the DIFFERENCE between the FINAL states of the universe a)if the average density of the universe is greater than the critical value b)if it is equal to the critical value
2)if the velocity of recession of the galaxies were not...