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2. ### Work in adiabatic process

Thanks for your help! i is an integer I think it's for any adiabatic system...i'm not too sure actually
3. ### Work in adiabatic process

Homework Statement My textbook says that W = i/2Δ(pV) for an adiabatic process. I don't understand :S Homework Equations W=∫pdV The Attempt at a Solution
4. ### Ultrarelativistic approximation

Thank you! :)
5. ### Ultrarelativistic approximation

I think you might have an extraneous β here, but thanks a lot!!! I get it now :)
6. ### Circle and Ellipse

So you mean the end of the ellipse closer to the other focii? Also I posted this here because it was in the context of elliptical orbits but now i realize it is more of a math question ;)
7. ### Ultrarelativistic approximation

I read that when v≈c, sqrt(1-β2) = sqrt(2*(1-β)). How do you show this mathematically? I have no idea. Thanks! :)
8. ### Circle and Ellipse

hi Yukoel, no, i don't seek a mathematical proof. i just want to understand the statement. I still don't really understand... what do you mean by it "states constraint of the tangency condition"? thanks for your help!
9. ### Circle and Ellipse

What does it mean when one says that "A circle and an ellipse with a focus at the circle’s center can touch each other only at the longer axis"? Can't you, by varying the size of the circle, make it intersect the ellipse in a variety of ways? Thanks! :)
10. ### Equation of motion for coupled oscillators

So are the "a"s just constants? x is the displacement from equilibrium right? Thanks! :)
11. ### Phase of Wave

Thanks Tiny Tim! i totally get it now :)
12. ### Phase of Wave

The phase of a wave at (x,t) is a0cosϕ = ℜa0eiϕ. Where did this come from? I know that the phase of a wave is given by ϕ = kx−ωt+ϕ0 but then I am stuck. Please help! Thanks :D
13. ### Higgs particle is 'found'

there'll be other things to discover; you'll still get to work at ATLAS :)
14. ### Electron in box considering effects of gravity

Okay En=n2∏2ħ2/(2mL2) Problems 1. Do we just set n = 1 since when know the particle is near the ground? 2. The equation is derived for when potential energy is zero (when kinetic and potential energy are equal). Is En going to be E in our case? So we get the equation below?* 3. We don't know L...
15. ### Electron in box considering effects of gravity

Oh! Well then Δp = \sqrt{2m(E-0)} - \sqrt{2m(E-mgΔx)} and we substitute this into ΔpΔx≥h/2∏ to find Δx. What is E though? Many thanks! :)
16. ### Simple buoyancy problem

Thank you flatmaster!
17. ### Electron in box considering effects of gravity

Sorry but I have thought about it really hard and I really can't come up with anything. If the electron is happy at the bottom, why would it have any momentum? If the electron is at the bottom, it has no potential energy... How can we know the kinetic energy K (it's not given)? p = sqrt (2mK)...
18. ### Simple buoyancy problem

What i mean is if the depth of water is the same in both situations but in one situation, the water encloses an object.

20. ### Electron in box considering effects of gravity

I mean, i know its total energy and potential energy but what are the values?
21. ### Electron in box considering effects of gravity

Thanks so much Steely Dan! I feel really stupid but how do you know what E and U are?
22. ### Simple buoyancy problem

but doesn't the air column above push on the surface of the water which pushes on the bottom? also, say submerging an object makes the water height h0. Is the pressure at the bottom with submerged object higher, lower or the same as the pressure at the bottom of a water column at height h0 (no...
23. ### Electron in box considering effects of gravity

Thanks Steely Dan! I don't know how the uncertainly principle can help here...could you please explain? As for the wave function, does this mean I have to use Schrodinger's equation? Do I have to use both the uncertainly principle and Schrodinger's or just one or the other?
24. ### Simple buoyancy problem

Homework Statement An object suspended in water is lifted out of the water. How does the absolute pressure at the bottom of the water change? Homework Equations The Attempt at a Solution Wouldn't the absolute pressure not change if the object is still directly over the water...
25. ### Electron in box considering effects of gravity

An electron is enclosed in a large rectangular box. Considering gravity, estimate the order of magnitude of the thickness of the layer that is occupied by the electron at the bottom of the box. I thought about this for a long time and I really have no idea how to proceed. Any thoughts?