Recent content by Brian1952

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    Any bio-related benefit of UV radiation?

    My thanks to all!
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    Any bio-related benefit of UV radiation?

    Another "Thank you!"
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    Any bio-related benefit of UV radiation?

    Thank you very much!
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    Any bio-related benefit of UV radiation?

    We're all pretty familiar with the harmful effects of UV radiation on biological organisms, including us. My question is whether there is any necessary or beneficial effect of UV radiation. That is, if our atmosphere suddenly started blocking out 100% of UV while passing all other radiation as...
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    Undergrad Is E=mc^2 Explained Correctly?

    Kilograms it is. Thanks to both for the double-check!
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    Undergrad Is E=mc^2 Explained Correctly?

    I am doing an article that includes a brief explanation of Einstein's basic equation, and want to check my work. As I understand it, the equation is e(energy in Joules)=m(in grams)×speed of light in meters/second squared(9×10 to the 16th). Is this reasonably correct? Thanks.
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    Undergrad Lowest probability for physical possibility

    My thanks to all for the responses. My original question had more to do with probability in physical events (chemistry, biology, geology, etc.) within the limits of our observable portion of whatever 'multiverse' might exist in reality. Thanks again.
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    Undergrad Lowest probability for physical possibility

    My question is whether there is a lowest possible probability for something to possibly (physically) occur on a cosmic basis? That is, is there a threshold 'lowest' probability below which something cannot occur? I'm not referring to 'zero' as the lowest probability. That's obvious. Rather, a...