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Message
re: Motion Sensing Outside Lighting Question
Posted on 3/10/16 at 6:27 am to TeddyPadillac
Posted on 3/10/16 at 6:27 am to TeddyPadillac
quote:
average density of the human body is .985 g/cm3,
Density of water = 1 g/cm3.
Human is less dense than water.
End of discussion.
2
Posted on 3/10/16 at 7:35 am to Pectus
And to everyone who says that 0.985 is pretty much the same as 1.00 in g/cm3 that's wrong.
That difference in density gives us our oceanic crust floating in our mantle.
Double that difference and that's why ice floats in water.
Triple that difference and you have the continental crust floating in the mantle.
That difference in density gives us our oceanic crust floating in our mantle.
Double that difference and that's why ice floats in water.
Triple that difference and you have the continental crust floating in the mantle.
Posted on 3/10/16 at 7:38 am to StrangeBrew
quote:Bruh.
A drop is denser than a human? Bones and clothing are less dense than water?
Posted on 3/10/16 at 7:42 am to Pectus
You're dense.
Posted on 3/10/16 at 7:45 am to Pectus
quote:
average density of the human body is .985 g/cm3,
Average - important word here.
also density of PURE water is 1g/cm3 at 32F
at 70F it's .977,
look at that, it's less than an average human, whatever we are calling an average human. The fatter you are, the less dense you are.
More muscle mass means your body is more dense than the average human.
Lot of factors go into this.
So..........some people float, some people don't, and depending on the salinity and the temperature of the water, that changes who floats and who doesn't.
Posted on 3/10/16 at 7:57 am to TeddyPadillac
We covered all of those bases.
But the guy didn't know that humans were less dense than a rain drop.
(I upvoted you, btw
)
I do think we are giving too much credit to float here. How about equally buoyant...doesn't sink doesn't float.
But the guy didn't know that humans were less dense than a rain drop.
(I upvoted you, btw
) I do think we are giving too much credit to float here. How about equally buoyant...doesn't sink doesn't float.
This post was edited on 3/10/16 at 7:59 am
Posted on 3/10/16 at 8:05 am to Btrtigerfan
Motion sensors use passive infrared detectors. CT scans can detect brain density, or lack thereof.
Posted on 3/10/16 at 8:18 am to Tigertracks
All motion activated lights on the market came from an assembly plant in the future. They were pre-programmed with the exact times that you would be walking by. That's how they know when to turn on.
This post was edited on 3/10/16 at 9:56 am
Posted on 3/10/16 at 9:30 am to Btrtigerfan
it also depends on the outside temp
the hotter it is, the less sensitive the sensor is
the sensor needs a contrast
the hotter it is, the less sensitive the sensor is
the sensor needs a contrast
Posted on 3/10/16 at 9:50 am to retired trucker
quote:
t also depends on the outside temp
the hotter it is, the less sensitive the sensor is
the sensor needs a contrast
Is this why cold fronts make my sensors go crazy?!!!
Posted on 3/10/16 at 9:52 am to Btrtigerfan
Size matters
Posted on 3/10/16 at 9:58 am to Pectus
quote:
It's denser than a human
We are all smarter than a drop of water
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