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The two electrons in a helium atom are separated by about 0.10 nm and the separation between either electron and the nucleus is about 0.050 nm. What is the total electric potential energy of the atom? Assume the nucleus is a point charge with q = +2e and for simplicity do not include the potential energy associated with the Coulomb repulsion of the two protons in the nucleus. Compare your answer with the ionization energy of a helium atom and with the energy required to remove both electrons from a helium atom.
a thermoelectric unit consists of n cells. when there is no temperature difference across the leads the resistance is 4
sketch a p-v diagram for a substance that contracts on freezing which includes all three phases with the triple line
determine an expression for steady temperature distribution in a long hollow cylinder with specified surface
does the job of managing a high-technology function e.g. an engineering design department differ from that of managing
calculate the attractive force of equilibrium between a pair of k and br- ion that just touch eachother rk 0.133nm and
1how do the rockwell and brinell tests actually measure hardness ? give any appropriate sketches and formula. are there
finding the time interval for the motorcyclist to reach a given acceleration if the motorcyclist starts from rest
a tennis racket hits a tennis ball with a force of fat-bt2 where a1 1280 nms b1 460 nms2 and t is the time in
a mass of 1 kg attached to a spring with a spring constant of 112 nm oscillates horizontally on a smooth frictionless
a wind tunnel is 6m long and has a cross section of 1m2. air flows through at 70ms at standard sea-level conditions
the collecting panels of a solar boiler receive energy as heat at the rate of approximately 300 btuhr-ft2 of collecting
A 0,5Kg mass attached linear spring suffress 01 N/m. Determine be naturak frequency of the system in hortz e reapert this calculation for a mass of 50Kg and a suffress of 10N/m and compare your result to that of part.
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