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rktpro

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Posts posted by rktpro

  1. There are theoretical explanations for conductivities of ions. Foe ex, down the group though mass increases but conductivity decreases as the ions becomes less solvated and more mobile. I considered a polar solvent here. The high conductivity of OH- and H+ are explained differently.

    There are theoretical explanations for conductivities of ions. Foe ex, down the group though mass increases but conductivity decreases as the ions becomes less solvated and more mobile. I considered a polar solvent here. The high conductivity of OH- and H+ are explained differently.

  2. If you are using rubber bands or elastic strings for providing the initial energy to the projectile then it would be pretty accurate to find out yourself the elastic constant by hanging weights. Since you have the range fixed, you can fix the angle of projection and using kinematical equations get the initial velocity. Now all you would have to know is the stretch required on the rubber band. By energy conservation principal you can find the amount of stretch. Your machine would be precise.

  3. You would require large setup to create high pressure and temperature. If it is a project planned do to at home, it is quite difficult. Why not change the topic to- Getting graphite from diamond. You get a big diamond and burn it! :D

  4. I recall a senior of mine whose teacher, who just teaches how to solve problems, told them that once they understands electomagnetism they can easily solve problems of gravitation by replacing k with g and charge with mass. That might have confused the thread starter. Being identical and being analogical pairs is different. You can solve heat current problems with the same law as that in case of electric current. The two are quite different things physically.

  5. Isn't sweet spot the point where when the ball hits the impulse suffered at the end held in hand is zero. It can be calculated using some concepts of rotatation of hinged rods and conservation of momentum both linear and angular abot the gripped end.

  6. As pointed out earlier, you can assume that motion is in say x-y plane and then break the motion along x and y axis. Now if you write equation of motion for the two axis, comibe one or two things cleverly, you will see the answer yourself.

  7. I think with what I was thinking of, there was an analogy with a bar magnet. If you break a bar magnet in half, those halves both have two poles, and you can keep breaking them in half until you get to a single particle where even then mathematics says it has two poles.

     

    Poles generate in magnets because all the electrons in it have same orientation and alignment. Visualise all electrons spinning clockwise and a magnet would seem like a solenoid. Electron is a single indivisible unit. Why you say it has two poles?

  8. Is my understanding correct than somehow single charged particles such as an electron have two varying magnetic poles? How does this happen?

    I think I was trying to figure out why magnetic monopoles are impossible, and I found out something about particles themselves having poles, so that even if you have something of pure electrons, it still somehow has two poles.

     

    I am only familiar with classic physics. Maybe in quantum realm, electrons are dipoles but not in classical models.

    Magnetic monopoles are impossible because of Gauss Law. I remember watching a video of some MIT professor who brilliantly explained that.

  9. Learning through analogy would be interesting. Here is one example.

    Suppose you have a big ball in your hand and a friend of yours stand 1m apart from you. You can certainly hit him. Now he moves to 10m. Now too, you can hit him but the impact wouldn't be that strong. Now he stands at 100m. Now you can't hit him. He is out of your reach. The reach you have is your field. It is not made up of something. It is an idea and used in mathematical form in science.

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