brotherbobby's latest activity
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brotherbobby posted the thread Writing a vector parallel and normal to a unit vector ##\hat n## in Introductory Physics Homework Help.Drawing : Let me begin by drawing an image of the problem which I show to the right. During the drawing, it made sense that this... -
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brotherbobby replied to the thread I ##\epsilon_{ijk}## in terms of ##\delta's##.Thank you @JimWhoKnew. I prefer the solution on wikipage to the one you provided in your edit above, because that was what I had in mind...
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brotherbobby posted the thread I ##\epsilon_{ijk}## in terms of ##\delta's## in Special and General Relativity.The two definitions : The Levi Civita Alternating Symbol is defined as below, taken from here. I put the relevant image above to the...
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brotherbobby replied to the thread B (Electric) current is not a vector quantity.Yes, I agree with you. Good point.
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brotherbobby replied to the thread B (Electric) current is not a vector quantity.Of course, but the trouble is, current has a direction. Distance and speed don't. That's the confusion I have been having. How can a...
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brotherbobby replied to the thread B (Electric) current is not a vector quantity.I am the OP of this thread. Since it's been a while, let me describe the issue I was having in brief. The issue : Is current ##i## a...
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brotherbobby replied to the thread B (Electric) current is not a vector quantity.Is this the definition of pressure though? I'd say ##p=\dfrac{F}{A}##. I don't think a dot product can be introduced here. Yes...
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brotherbobby replied to the thread B (Electric) current is not a vector quantity.I agree, but current does have a direction based on where it flows.
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brotherbobby replied to the thread B (Electric) current is not a vector quantity.Given flux ##\displaystyle{\Phi_B=\iint_S\vec B\cdot d\vec a}##, of course flux is a scalar like electric current...
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brotherbobby replied to the thread B (Electric) current is not a vector quantity.Does it make electric current a vector too?
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Can we write for two different current density vectors : $$\vec J=\vec J_1+\vec J_2?$$ If we can, which is what I suspect, will it also...
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