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Draw to scale the three electron energy level and transition energy diagrams of the isolated neutral He atom (with two electrons) and the He+ lon (with on electron) in analogy to Figure (a)-(c) but taking into account the +2 nuclear charge from the two protons.
The first and second ionization potentials of He are 24.587eV and 54.416eV. There is again a solid-state analogy in semlconductors, such as the sulfur (valence=6) impurity center in silicon (valence=4).
what issues presented themselves as obstacles and what were opportunities that advanced nanotechnology in
A resistance R and a 1.5-H inductance are in series across a 60-Hz ac voltage. What is the ac input voltage
a sample containing beryllium atomic mass 9 u aluminum 27 u and an unknown element is placed in a mass spectrometer.
A bullet is fired horizontally from a gun. At the exact instant the trigger is pulled, a ball is released from the exact same height as the gun and allowed to fall to the ground. Which projectile hits the ground first, or do they hit at the same time..
A cart that has a mass of 100 kg goes around a vertical loop at a constant speed of 10 m/s. Determine the force that the seat pushes on you with v = 7r at the top of the loop
At time zero, an object is thrown upward at a speed of 14.0 m/s from the top of a 91.0 m tall building. What time is it when the object hits the ground
a 0.30 kg ball is tied to a 38 cm long string and released from a horizontal position. it swings down colliding with a
A parallel plate capacitor has a potential difference of 1.6V, a plate separation of 2.5mm, What is the magnitude of the electric field within the plates
A major leaguer hits a baseball so that it leaves the bat at a speed of 32.0 and at an angle of 36.9 above the horizontal. You can ignore air resistance. What is the direction of the baseball's velocity when it returns to the level at which it left..
A sled is initially given a shove up a frictionless 25 degree incline. It reaches a maximum vertical height 1.35 m higher than where it started. What was its initial speed
A charge of -2.83 μC is set at the center of a compass. Find the magnitude of net electrostatic force acting on charge at the center
Two ice skaters, Daniel (mass 60.0kg ) and Rebecca (mass 45.0kg ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, What is the magnitude of Daniel's velocity after the collision
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