Recent content by afr123

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    Understanding 3 Digits of Accuracy in Calculus Problems

    I'm refreshing my knowledge of calculus and ran into this problem while working on limits. "Find∗ the value of each of the indicated limits to at least 3 digits of accuracy by evaluating f(x) at various values, or state that the limit does not exist (DNE)." My problem is with "at least 3...
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    Medical Active heart rate wrist monitor technology- Without using a chest strap

    Yes, such technology exists. It looks like you're looking for a continuous reading (don't need to touch with fingers) of the heart rate without a chest strap. They are rare, but they do exist. If you want a device (iPhone) to read it out, I'd probably suggest the Rhythm, and if you want to...
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    Fission to make gold or silver

    Thanks. I don't know much about chemistry/physics - only at the high school level. I'm just trying to understand, as an investor, whether or not it is 1) feasible to create gold and silver at economical levels and 2) if it is not, do you think it will be possible in the near future. When...
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    Fission to make gold or silver

    What's stopping entrepreneurs from using fission - taking mercury, for example, or any heavier element for gold/silver - and creating gold and silver from it? Do you think there will come a day when this is commercially viable? Any guesses when?
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