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    Help me understand why salted water tastes salty

    Great answer, many thanks! A body needs a heap of sodium and so I guess we're rigged to taste its presence even when it's in a somewhat adulterated form.
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    Help me understand why salted water tastes salty

    Elemental sodium is poisonous so presumably we don't know what it tastes like. Chlorine is a gas, I believe. But we know well the taste of salt, sodium chloride. But dissolving the stuff in water breaks up the molecules into ions which I presume spread around widely. So what are we tasting in...
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    Wonder electro-harm potential of scenario

    If one were to accidentally touch only the hot wire (ie black) of an ordinary household circuit while standing barefoot on a dampish dirt floor, what is the potential for a strong shock and if contact is maintained, possible electrocution? Idealize the scenario with: you're wearing only briefs...
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    Curious about gravitational sluing detail

    You think a symmetrical object would pick up any spin if slingshot dramatically around the periphery of a black hole? And... you lost me at "but it's speed will be the same as it was before". It's well known that NASA employs the maneuver to boost a craft's speed.
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    Curious about gravitational sluing detail

    Or... The slingshot object would pick up spin but physicists attribute that to "tidal forces" and exclude it from being a "GR effect". That might be splitting hairs but I could see their point of view I suppose.
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    Curious about gravitational sluing detail

    So some falling asymmetrical object would pick up non-negligible spin if it were slingshot (dramatically) around a black hole -- you think?
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    Curious about gravitational sluing detail

    I've been 'away' in that I wasn't notified of the last 6 or 7 posts -- could have something to do with moving this thread elsewhere. ('strange that Thread Tools says I'm still subscribed) I really appreciate Integral's reply. Sure, let's make the rock I gigantic femur-shaped thing, or...
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    Curious about gravitational sluing detail

    Sure, the mention of a moon was kind of odd. You could say the rock had an encounter with an actual planet. But it's relevant that the encountered body has no atmosphere (or at least that the runaway rock never touches or interacts with such atmosphere, which could tend to complicate the thought...
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    Curious about gravitational sluing detail

    Let's say a big rock is headed toward a small moon, impelled only by existing momentum and gravitational pull. The rock is not rotating or tumbling at all, leastwise not in relation to the local time/space norm. The rock is sped up by the moon's gravity and it falls ever faster and faster. But...
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