- What is the speed of an electron whose kinetic energy is 60ev?

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How do you prove that: tan^2 theta / sin^2 theta? Have humans reached the pinnacle of evolution halting all further adaptations with our activities? Find the image of O(-2,-1) after two reflections, first across the line y= -5, and then across the line x= 1? Say someone's chances of improvement are multiplied by a factor of 1.4, how can I convert this factor to a percentage? Which describes how temperature, humidity, and pressure vary within an air mass?