256bits's latest activity
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256bits reacted to AlexB23's post in the thread Peltier thermopar for hand heat charging battery with
Like.
Yup, a student built a hand heat powered torch back in 2014, and the torch needed 6 mW to power. The torch lit up, but barely. Torch... -
256bits reacted to berkeman's post in the thread Peltier thermopar for hand heat charging battery with Like.
Sorry, that did not translate very well and I'm not able to parse it. Please try again with more words? Please show us your...
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256bits reacted to OmCheeto's post in the thread Peltier thermopar for hand heat charging battery with Like.
According to the Casio 5230 User Guide, turning the light on for 4.5 minutes will drain the battery in your watch. I did though do some...
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256bits reacted to russ_watters's post in the thread Peltier thermopar for hand heat charging battery with Like.
That isn't true. The entire body puts out about 70W of heat. The surface area of a hand is probably 1% of the entire body. And...
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256bits reacted to AlexB23's post in the thread Peltier thermopar for hand heat charging battery with Like.
No idea, as I am not an engineer. Probably figure out the conductivity and mass of the metal, then use Newton's Law of heating.
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256bits replied to the thread Peltier thermopar for hand heat charging battery.I was speaking rhetorically, but nice answer.
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256bits replied to the thread Peltier thermopar for hand heat charging battery.And for how long would the 6mW last, as the tube would lose cooling as hand heat warms it up, and the device in turn lose electrical...
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256bits replied to the thread Peltier thermopar for hand heat charging battery.The whole human body at normal rest/light activity generates around 100W of metabolic energy production. If all the energy production...
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256bits reacted to Dale's post in the thread Undergrad Why is water pressure increased in a plastic bag in a bucket? with Like.
This sounds like the most likely hypothesis. It could be tested by comparing a bag with trapped air and a bag with all air removed. It...
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Dave gets in a robotaxi. A few minutes later: "Faster, faster! I'm late for my appointment!" "I'm sorry Dave, I'm afraid I can't do that."
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Stepping on LEGO...
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256bits reacted to sophiecentaur's post in the thread Undergrad Why is water pressure increased in a plastic bag in a bucket? with Like.
There is one difference between D and the others and that could be the air pressure on the surface of the water in the bag. Very little...
