Why is the Schrödinger equation so much simpler to solve for electrons in atoms like H and He+ than for Na or even B+?
The Coulomb potential field that is approximated as the only one affecting the electron in the cases with one electron around the nucleus gets far more complicated with the addition of even one more electron. The Schrödinger equation becomes very difficult to process.
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When did the extinction of the dinosaurs occur?
A) about 3.5 billion years ago B) about 2 billion years ago C) 540 million years ago D) 65 million years ago E) less than 1 million years ago
Is the force holding the electrons into their atomic orbits in an individual atom basically the same as the force that hold the sun's planets in their orbits? Why or why not?
A) Yes; it is the force of gravity in both cases. B) Yes; it is the centrifugal force in both cases. C) No; the sun's energy source is nuclear fusion, and fusion does not occur within individual atoms. D) No; gravity holds the sun's planets in their orbits, while nuclear forces hold the electrons in their orbits. E) No; gravity holds planets in their orbits, while the electromagnetic force holds electrons in their orbits.
Consider the two situations shown in the figure below, in which there is no acceleration. In both cases the men pull with a force of magnitude F. How does the reading on the scale in part (i) of the figure relate to the reading on the scale in part (ii)?
What is the voltage across the fuse that was left in the circuit? Explain your answer. V = ___________
Fill in the blank(s) with correct word