2011年11月16日 · In summary, to estimate the ground-state potential energy surface for H2+ using first-order perturbation theory, we can use the relation V(R) = E_0^1(R) - E_0^0, where E_0^1(R) is the first-order correction to the energy at a given internuclear distance R and E_0^0 is the energy of the unperturbed system.

2007年4月12日 · :rolleyes: surface potential is defined as the electrostatic potential energy of a surface confined charges. By Kelvin probe microscope, the the surface potential can be measured and the variation from negative to positive can be seen at different region on the interface. My question is: is it...

2010年3月23日 · Err, well, potential energy is relative to any pre-defined reference point. For a great many applications, that reference point is the surface of the earth. I suppose you ccould say the lowest reference point for an earth-centered potential energy …

2011年6月5日 · The equation -mMG/r, on the other hand, is a more accurate representation of potential energy that considers the changing force. However, when h is much smaller than the radius of the Earth, the two equations become equivalent and both represent the potential energy of …

2019年9月18日 · When I was reading about surface tension I came through the following line - ' The molecules at bulk inside the fluid has lesser negative potential energy than those on the surface.' In this context, what does lesser negative potential energy mean? My interpretation - The molecules inside the fluid are surrounded by other molecules.

2021年4月29日 · The case with finding the electrostatic potential energy of a shell of uniform surface charge density is even less obvious to me. It seems the general prescription in this case is even more hand-wavy - you assume you already have a shell of charge q assembled, and so the work necessary to add a charge dq to it is simply ##qdq / 4 \pi \epsilon_0 ...

2012年7月8日 · In summary, the presence of gravitational potential energy on a horizontal surface depends on the choice of reference point. However, what matters physically is the change in GPE, which is zero if the height remains constant.

2018年11月11日 · The change in gravitational potential energy of a mass m as it moves from the surface to a height h above the surface of a planet of mass M and radius R is given by: ΔPE= GMmh/R(R+h) a) show that when h is very small compared to R , this approximates to the more familiar expression for the change in gravitational potential energy near the surface.

2008年1月21日 · Ie the potential is whatever you set it to. Teacher probably wants you to assume potential at infinity to be 0, so that the potential at the surface works out to: V = - 1/4πε Q/r (relative to infinity) Q is the total charge, ie Q = σ * surface area = σ 4πr^2 So the potential at any point inside, is the same as the potential at the surface ie

2016年12月20日 · Homework Statement Hi, Infinitely far away from a mass-->gravitational potential is zero. As get closer-->becomes negative. At surface-->it is the smallest value of r, i.e. the radius of the mass, hence the most negative value for gravitational potential. But as you go below surface of Earth...