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  1. H

    EM question

    What was the question? you shouldn't change it! some might needed to take a look. hhegab
  2. H

    Tension in string attached to two fixed points

    Andrew Mason, you are just smart! hhegab
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    Two limited integration questions

    Can you put like , first case is true if f(x) is even and if such and such.... I shall study your answer. But from my first reading I need more. I need a condition to apply to f(x) so I can use each of the above properties. hhegab
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    Two limited integration questions

    Peace! I want to know the conditions that must be satisfied by a function f(x) for any of the following two cases to be true (each case independent from the other); 1- \int^a_{-a} f(x) dx = 2 \int^a_0 f(x) dx 2- \int^a_0 f(x) dx = \int^0_a f(x) dx They gave me confusion when...
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    Electric force

    Peace for you all, and that is what I did! but I find my integration limits not as those in the answer book. as for d, sorry, it is b-2a. hhegab
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    Electric force

    Peace! I wanted to find the elecric field of the rod to the left and then find the force element acting on the right rod. I got; E=\frac{k_eQ}{d(2a+d)} now, dF=E\ldot dx then what shoudl I use for integration limit? hhegab
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    Electric force

    Peace! The problem is that I can't grasp the answer! I have tried with the integration but I use different limits for integration. I shall post the answer if you want to. hhegab
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    Electric force

    Peace! I am supposed to find the electric force acting on the right rod due to the rod on the left. each is of length 2a and b > 2a. Each rod carries a charge +Q. I have difficulty in finding the integration, especially its limits. hhegab
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    Electric forces/static equilibrium doozy

    Peace! I did the problem twice and I had the same answer as that of A M. Either you gave us a wrong input somewhere, or that the answer you have is not accurate...Please check the problem and the inputs in it. I have aslo tried to solve it assuming that a charge Q was divided equally...
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    The electric field of two plates

    Peace! The field lines are perpendicular to the surface, and directed either inward or outward according to the sign of sigma, when they added (vectirially) they will give a zero field. Also, even in the presence of a field inside the conductor, when we put it an an external elecric field...
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    The electric field of two plates

    \sigma = \frac{Q}{A} in both cases; hhegab
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    The electric field of two plates

    Peace, In Serway's Physics for S&E ,6th edition, chapter 24 section 4 (conducing surfaces), when using Gauss' Law \oint{\vec{E} \cdot d\vec{A}} = \frac{Q_{enc}}{\epsilon_0} is used, we have A as the TOTAL surface area not a surface of a particular region on the material under study...
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    The electric field of two plates

    Hi, my answers are; For Al E= \frac{\sigma}{\epsilon_o} for Glass E= \frac{\sigma}{2\epsilon_o} Someone tell me if I am wrong, please
  14. H

    A wave in two different strings

    and there should be a node at the meeting poing (between the two strings) hhegab
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    The left bank of the river!

    Solved! There's a sideways force (Coriolis force) acting on anything moving towards or away from the axis of rotation in a rotating frame such as the earth. The Coriolis force per unit mass (acceleration) is: F1 = 2 Omega x V where V is the velocity in the rotating frame. The magnitude...
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    A wave in two different strings

    A string has two parts: one with a very high mass density (per unit length), and the other with a very low mass density. A wave with amplitude A moves from the dense part toward the light part. What will be the amplitude of the wave which is transmitted to the light part? hhegab
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    The left bank of the river!

    Well, I thought any one could ask his professor. I will not lose hope. hhegab
  18. H

    The left bank of the river!

    Well, Any one can ask his Classical Mechanics Prof. to solve it then. hhegab
  19. H

    The left bank of the river!

    No one cared about it and I have been struggling to do it. Should any one know where can I find the answer will be appreciated. hhegab
  20. H

    The left bank of the river!

    Yes! I shall not ask you how could you make it. I am sure it is written here :) hhegab
  21. H

    The left bank of the river!

    Hi all, I have the following problem which I have tried to solve for a very long time, very very long time indeed- 2 or more years. I am studying here all by myself and I got no one to help me. I shall not participate in any talk. I have had enough with it. this problem is in the Schaum's...
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    Another question about projectile motion

    you could find the solution in the Haliday and Resnick book (plane motion). It is solved there. hhegab
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    Ordenary differential equation

    Dear Tom, This problem appears in my book! I have struggled with it for 2 months (and I shouldn't have done). Well, I guess I will stop now. PS. It is said that it has an integration factor !!! I have done my best to find it, but it was not there. hhegab
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    Ordenary differential equation

    Hi, I have the following ODE, which I could not solve, (7x^3+3x^2y+4y)dx+(4x^3+x+5y)dy=0. I have tried to use the integration factor technique, but I could not find one. It can be put in the form: M dx +N dy=0, where M=7x^3+3x^2y+4y, and N=4x^3+x+5y. Can you help me? And How can it be done...
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    Fundamentals of physics book solutions

    Well, I have this question now in my mind, which is better in your opinion: Fundamentals of Physics, by Halliday and Resnick, or Physics for Scientists and Engineers, by Raymond Serway? hhegab
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    Fundamentals of physics book solutions

    Unfortunately, NO :( I am to google agian for these solutions. Thank you. hhegab
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    Fundamentals of physics book solutions

    Well, as I said I have the book and I do study it all by myself. But sometmes I face challenging problems (who doesn't) and I was told that I can find a solution manual on the web, html or pdf. that is what I am asking for. SO can anyone help? hhegab
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    Fundamentals of physics book solutions

    Hi Well, I am doing all the study of physics here by myself. I have The fundamentals of physics book, but all I need is the solutions to its problems. I have tried to search for such solutions but I could not find any, do you think you can help me in finding some of the solutions? hhegab
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