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An atomic electron (charge q) circles about the nucleus (charge Q) in an orbit of radius r; the centripental acceleration is provided, of course, by the Coulomb attraction of opposite charges. Now a small magnetic field dB is slowly turned on, perpendicular to the plane of the orbit. Show that the increase in kinetic energy, dT, imparted by the induced electric field, is just right to sustain circular motion at the same radius r.
You are outside on a hot day, with the air temperature at . Your sports drink is at a temperature in a sealed plastic bottle. There are a few remaining ice cubes in the sports drink, which are at a temperature , but they are melting fast. b) Give reasonable values for the three temperatures in degrees Celsius.
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