Created by StemPy LabFor the electron in the first excited state () of a hydrogen atom, the kinetic energy, the potential energy and the total energy are, in order,
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← A ray of light falls at right angles on one of the short faces of a glass prism whose cross-section is a right-angled isosceles triangle, as shown in the figure. It goes straight in and meets the long face (the hypotenuse) inside the glass. The smallest refractive index of the glass for which the ray is totally reflected at the hypotenuse is closest toA rocket of total mass 2000 kg stands upright on its launch pad. Its exhaust gases leave at 400 m/s relative to the rocket. Taking g = 10 m/s², the smallest rate at which it must eject gas to just lift off, in kg/s, is ____. →
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