Recent content by EDerkatch

Could someone please explain to me why uds->uud+danti-up is an allowed reaction even though individual quark number conservations are violated?

Yes this is. I really don't know how to work that out right now, could you give me a hint?

"1 mg (0.001 g) of the isotope 239Pu is placed inside a detector. 239Pu alpha-decays with a half-life of T1/2 = 24119 yr. Calculate how many alpha-particles from the decay will be detected in 1 hour. (Assume 100% detection efficiency)." Could someone please show me how to do this question...

Could someone please explain why relatively light nuclei do not undergo spontaneous fission? Thanks.

Hi everyone, If anyone could point me in the right direction with this problem I'd really appreciate it. "Show that the cosmological constant can be interpreted as a perfect fluid having an equation of state w=-1." I have a rough idea of how to do the second part of the proof: if the...

Hi everyone, If anyone could point me in the right direction with this problem I'd really appreciate it. "Show that the cosmological constant can be interpreted as a perfect fluid having an equation of state w=-1." I have a rough idea of how to do the second part of the proof: if the...

Hi everyone, If anyone could point me in the right direction with this problem I'd really appreciate it. "Show that the cosmological constant can be interpreted as a perfect fluid having an equation of state w=-1." I have a rough idea of how to do the second part of the proof: if the...

Could someone please explain why the 1s2s3p excited state of helium is metastable. Thanks:).

Yes lol, I just can't do this question, could you please show me the working for it... In fact can you do it yourself?

Ok if you could please show me the COMPLETE working I would really appreciate it... Thank you.

Ok if you could please show me the COMPLETE working I would really appreciate it... Thank you.

Please go on...

How do I get from u(x, y)=A(x^c)(y^2c) to the general solution? Thank you.

x(δu/δx)-(1/2)y(δu/δy)=0 By first looking for a separable solution of the form u(x, y)=X(x)Y(y), find the general solution of the equation given above. Determine the u(x,y) which satisfies the boundary condition u(1,y)=1+siny For the separable form I have u(x, y)=A(x^c)(y^2c), could...