Recent content by wolfgang

Hi, We know that the gluons rest mass is 0.On the other hand we also know that the u and d quarks that compose the nucleons are responsible for the 50% of the nycleons mass for the rest 50% are responsible the gluons! Why the massless gluons “gain” mass when they are inside the nycleons...

Hi, Initial velocity: You must think what is the relation between the time that the ball goes up and the total time of the movement you have measured. Then you must think what happens to the velocity of the ball when it reaches the highest spot of its orbit. With the above data and the...

Hi everyone, If the first is equilibrium then the second is not. In the first picture the centre of the gravity of the blue object is on the right of the pivot, let’s say that the distance between the pivot and the centre of the gravity of the blue object is D. Similar the distance...

Thanks for replaying guys, but I want also to add (I am sorry I did not give this information in my first mail) that the phenomenon must have something to do with the size of the vessel we are using. Especially with the width and not the height of the vessel because if you use a little wider...

Hi,everyone Everyone of you must have done the following experiment while you prepare your breakfast. Put an egg (boiled or not) in a glass or brig then put the glass under a tab and release the water, you will notice that seconds later the egg will slowly arise to the top of the water...

o.k the site says that is Äpx*Äx>= h/4ð but can somebody explain me WHY ? WHY is h/4ð and not h/2ð ?

Hi everyone, I do not think that Äpx*Äx >= h/4ð is correct. As we know a particle that is moving can have an orbital angular momentum which minimum value on a specific axis is h/2ð and an intrinsic angular momentum(spin) which minimum value on a specific axis is h/4ð. In...

I am not quite sure but Äl*Äè > h/2ð means that we can not know exactly the value of the angular momentum and its direction at the same time.

Hi, You mention the momentum/location and energy/time relations but what about the angular momemtum/angle relation Äl*Äè > h/2ð ?

Hi, I think that this not so “simple” as the collision between an X-ray photon and an electron. This is because here appears the photoelectric effect. The free electrons of the metal can absorb only photons that have energy bigger than the extraction work of the metal. So if the...

Hi, Indeed Claude Bile your explanation was very clever. I would not think of it. Thank you anyway :wink: "The only thing I know is that I don't know anything"...

I think that the simpler spring with variable K elastic constant could be made from rubber. When you stretch this rubber spring the elastic constant would take a value K (the value of K depends on who hard is the rubber). On the other hand during the compression of the spring the value of...

more questions You are obviously talking about the equation of Compton: ë´- ë= L(1- cosö). Where L is equal to L=h/mc=0.02426 Angstroms (for the electron) so the shift ë´- ë of the photon is between 0 < ë´- ë < 0.04852 Angstroms (because 0< 1-cosö < 2). We know that the...

Hi! We have so far that F=m(dv/dt)+v(dm/dt) now multiply the last equation with dt (I know the mathematicians will loose their hair with this but as you know this work very well in physics) and you will get: Fdt=mdv+vdm and here is where you have the problem, divide with dm and you...

I hope that the following will help you. You have the equation f=dp/dt, but we know that p=mv so: f=d(mv)/dt. When m is constant then we have the famous f=mdv/dt we were using at school for years (a=dv/dt), but what happened when m is not constant. When m is not constant...