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  1. H

    Gay Penguins

    Did those scientists find any evidence of any sexual behaviour between them? As it is said, since they are in captivity, they could just be shring their grief. Homosexuality is not a natural behavior between animals at all. hhegab
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    Programs I want to get a degree in Physics, but I'm scared I fooled around too much

    If any one wants to have a success in life...just read those comments! I have printed them and put them infront of my desk. hhegab
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    EM question

    What was the question? you shouldn't change it! some might needed to take a look. hhegab
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    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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    Hi, I am Here again

    Thank you all, the number 42; I am not sure I owe anything but my good company :) I really missed this place. I feel I am living again when I came back...life is boring, but some can make it a nice experience....enjoy it here! hhegab
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    Problems with attached pics!

    Peace! I have a problem when attaching pics to my messages. I can't know about the pixel size of my attached file. How can I know it? And how can I reduce it if it is larger than the limit? hhegab PS. I am not sure if this is the correct place of my post, so please forgive me if it is...
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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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    Hi, I am Here again

    Hi, I have been a memeber of this forum for sometime and I was not that acive , :zzz: forgive me. I had lots of work and studies to do. I am back with many questions and hope to be as active as I should be :!!) I am happy to see myself here again :biggrin:
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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
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    Introduction to the Lagrangian form of classical mechanics

    You can for sure try Schaum's book "Theoretical Mechaincs" this is a very good book and full with problems that will clarify things to u. give it a try. hhegab
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    Testing GRE Physics test prep tips

    best thing is to re-read the courses you had studied before in ur undergrad. and try to solve the 3 exams released from ETS. you can share me ur opinions. as for links, www.grephysics.com is a nice link hhegab
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    Testing GRE Physics test prep tips

    I am currently preparing to take the test, I use Halliday and Resnick and also Serway for preparation. I have some schaums books to to review things from it. I am to take it next nov. hhegab PS. Pple here who have gone through this experience should help us in this please
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    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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    I can't do these diff. eqns.

    thank you in advance man! Hatim
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    I can't do these diff. eqns.

    Hi, I have been trying to solve the following differential equations I was stuck with them. I will appreciate any help from you; 1- 3 y' +3x/y =2(xy)^4 I have tried Bernoulli but I could not get a standard form. 2- x' -2 x y = y exp (-3y^2)[x exp(-y^2)+ 3(x exp(-y^2))^2] I have tried here...
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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
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    The left bank of the river!

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