Created by StemPy LabThe mean life of a radioactive isotope is . In a time equal to , what percentage of the nuclei in a sample decay?
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← Unpolarised light passes through a polariser and then through a second sheet (the analyser), which is slowly turned through a full circle about the direction of the light. As it turns, the light coming outA satellite of mass 100 kg is lifted from the surface of the Earth to a height equal to the Earth's radius. Take g = 10 m/s² at the surface and the Earth's radius as 6400 km. The increase in its gravitational potential energy, in megajoules, is ____. →
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