russ_watters's latest activity

Yeah, I am surprised also. Probably for money grab or something. Also, thermoelectric tech is fascinating, cos spacecraft beyond Jupiter...

Just in case some materials are found to increase efficiency from the current Peltier device.

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...

Good science fair project but I'm surprised they bothered to patent it.

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...

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...

Can you show us your calculations that support this? How much energy do you get out of a Peltier thermoelectric generator with a human...

CNN has an article, but I feel like there should be more coverage of this. Seems like kind of a big deal...

Successful return of Crew-11, the crew just left the capsule. Everything looked completely normal. If it's something related to zero-g...

Parachutes don't give you precision, so you can only do an ocean splashdown. That's bad for the engines, and the corrosive salt water is...

I heard that there might be a manned mission to the moon in 2026. Is this true?

I got my degrees in general physics and geophysics and it’s been a long time since then and I am having a hell of a time finding people...

Here's the way I would say it, following from our thread on suction: The definition of suction is the removal of air (in this case) from...

Because kinetic energy, KE = ½·m·v², less energy is needed to draw in a fixed mass of air from a hemispherical shell at velocity v, than...

I think it is as simple as the explanation found unsatisfactory in the first para of the initial post - Put the fan in a duct and the...