Created by StemPy LabA rocket of total mass stands upright on its launch pad. Its exhaust gases leave at relative to the rocket. Taking , the smallest rate at which it must eject gas to just lift off, in kg/s, is ____.
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← For the electron in the first excited state (n = 2) of a hydrogen atom, the kinetic energy, the potential energy and the total energy are, in order,Two identical whistles, each sounding at 340 Hz, stand still beside a straight railway track, some distance apart. A passenger on a train moving at 10 m/s between them, from one whistle towards the other, hears both. The air is still and the speed of sound is 340 m/s. The number of beats per second the passenger hears is ____. →
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