Determine whether the radial functions for the 2s and 2p orbitals of a hydrogen atom (R2,0(r) and R2,1(r)] are eigenfunctions of the Coulombic potential energy operator: V^ = -Ze² /4πϵ₀r. If so, give the eigenvalues. If not, then calculate the expectation values of the average potential energies of an electron in 2s and 2p orbitals of a hydrogen atom. Hints: recall that the volume element in spherical polar coordinates is dv = r2sinθdrdθdΦ. Also, recall that the spherical harmonics are normalized.

the answer is d. 4

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i don't understand. explain it clearly

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle