Discuss why the new theory, called quantum mechanics, was so successful
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It unifies the wave-particle duality into a single consistent theory and has successfully dealt with the spectra emitted by complex atoms, even the fine details. It explains the relative brightness of spectral lines and how atoms form molecules. It is also a much more general theory that covers all quantum phenomena from blackbody radiation to atoms and molecules. It has explained a wide range of natural phenomena and from its predictions many new practical devices have become possible.
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In a double slit experiment, the slit separation is constructed to be exactly 4 times the wavelength of the light passing through the slits
At what angles from the center of the pattern will the third bright fringes on both sides of the central fringe occur? A) ±48.6° B) ±75.0° C) ±67.5° D) ±36.9° E) ±43.0°
The average speed of a horse that gallops 10 kilometers in 30 minutes is
A) 15 km/h. B) 20 km/h. C) 30 km/h. D) 40 km/h.
When a 45-kg person steps on a scale in an elevator, the scale reads a steady 410 N. Which of the following statements must be true? (There could be more than one correct choice.)
A) The elevator is accelerating upward at a constant rate. B) The elevator is accelerating downward at a constant rate. C) The elevator is moving upward at a constant rate. D) From the given information, we cannot tell if the elevator is moving up or down.
In a cooling magma, which minerals are the last to crystallize?
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