Recent content by thebigstar25

Well how do you know that they are moving with the same velocity? I don't think this assumption is valid since you started with hot air in one room and cold in the other one, so basically they both have different velocity to begin with .. Hope I can see more replies to this topic from...

I don't get it! .. how can we make such statement?

I have a question for you, why did you say that 50 volt is 50 jole?

you can use what was suggested in the previous post to find <x> and <E>, substituting the operator O with x to find <x> and E to find <E> .. and of course, the wavefunction to be used in this situation should be the wavefunction of an infinite one-dimensional potential well (as far as I remember...

oh! I got it now, that part was confusing me :) .. Thanks a lot again for the great help

Thaaaaaaaaaaaaaaaaaaaaaaaanks alooooooot I got the answer .. really I can't thank you enough for your help ! .. If it is possible to answer my last question in the previous post you will make my day more than great :) .. Thanks again

I was just saying that my two waves are as follows: 4 sin(20t + (pi/3)x + pi) 2 sin(20t +(pi/4)y + pi) I was wondering what if the second wave was 2 sin(20t +(pi/4)x+ pi) with x = 2, then I will end up with the same answer? why is that? Thanks a lot for the clarification, I will try...

as simple as this problem may seem, I feel like I am missing few things! first I am not sure why do I have to substitute the values of x and y at the beginning then add the two waves, it would not make a difference if the problem has two waves in the x direction or y direction or one in the x...

I am sorry but I can't see where I can apply the formula again

I did that and I got -2sin20t + 1.46cos20t which doesn't look like the final answer?

Homework Statement I have two plane waves, one of the form: 4 sin(20t + (pi/3)x + pi), and the other one: 2 sin(20t +(pi/4)y + pi) .. with the same frequency and vibrations in the z direction .. I am asked to find the resultant wave equation at x = 5 and y =2 Homework Equations...

I would say that you got it right, but would you please write down how you got this result..

im not sure what you have done? you can start by subtracting the first equation from third equation, then you will have the value of c after that you can use this value in the second equation to get either a in terms of b or b in terms of a, after that you can easily substitute again in the...

I think that you are familiar with what result you should obtain when you have L+ (the raising operator) acting in a state? I don't remember what is it exactly but I am sure there is ( taking in account that i.e |1,-1> the 1 refers to l and -1 refers to m) .. I remember that when you have L+ or...

I think It is better to go back to the definition of the slope, and you should determine which is the vertical axis and which is the horizontal axis ..