Search results

The turbines are both a converter of energy, and a store of energy A turbine spinning quickly has lots of a energy stored as motion A turbine going a little slower has slightly less energy. If a turbine's speed is declining, then its output power can be more than its input power.

By turbine, I mean a device that produces mechanical motion from flowing gases (or liquids). The exact inverse of a pump. No, the steam turbines in power stations that turn the generators. The steam pushes the turbine blades round. Note that slowing them down frees up energy, not power...

A slick video, though I'm not entirely sure about "Hydrogen can be stored easily (1:13) ... free of losses (1:47)" I'm also a bit surprised that putting hydrogen into the existing (methane) gas supply pipes would work out as easily as they imply. If you have an equal volume-flow rate of...

I thought the varying frequency was an unintended result of imperfect load-demand matching, rather than a deliberate ploy. My understanding: Loads are organised to appear resistive - this means that as much of the current in the grid as possible does something useful As such, it doesn't really...

The big advantage of gas, as I understand it, is that gas turbines are quick and easy to start and stop. If it's a windy day, you can't just turn off the coal-fired power stations and let the country run off wind. Nuclear is even worse Better, of course, would be storage - but batteries are...

While The Librarian is distracted reading that other thread, I'll bring up a pair of gaslamp-fantasy series I've found very enjoyable: A Natural History of Dragons (Marie Brennan): - The memoirs of an eminent Victorian naturalist in five parts. She goes on Expeditions, makes great...

Aʜ. Yᴇs. I ǫᴜɪᴛᴇ ᴀɢʀᴇᴇ. Dᴏ I ʀᴇᴀʟʟʏ ʜᴀᴠᴇ ʙᴏɴʏ ᴋɴᴇᴇs?

Ook? Oooook!

...and out of stock at the moment, sadly: https://www.aliexpress.com/item/M5Stack-Multi-function-Watch-With-ESP32-and-850mAh-Battery-for-Arduino-Micropython-Intelligent-Programmable-Watch-with/32854179945.html

Adafruit's "Feather" range of µC devboards might be of interest - particularly: 3321 Mini Color TFT with Joystick 2829 32u4 Bluefruit LE Those, between them, would give you an arduino-compatible microcontroller, Bluetooth radio, Battery management, a display, and a few buttons. 3D...

Just count the number of primary and secondary windings?

As Levi says, trading photos must include your forum username, in order to discourage fraud. I've moved this to Trading.

I'm honestly baffled that people worry so much about spelling. If people are treated fairly and with respect, who cares what the word is? Plenty of cultures routinely use 'offensive' words without any offence being intended or taken. Plenty of other cultures encourage abusive behaviour. Isn't...

Did you lot Enter a pun competition or something?

I suppose there is a lot to be said for software-level disabling techniques on machines where you've got meaningful admin access (i.e. not recent versions of windows). Uninstalling the drivers can make the hardware as useless to userland malware as a pair of wiresnippers. If the malware has...

How does a CoC differ from a conventional set of rules? Plenty of organisations have had, and still have, imprecise sets of rules for members/participants. I'd even argue that it's impossible for a rulebook that applies to human interaction to be otherwise. People and language are too...

I wouldn't necessarily trust physical shops. Knock-off cards have entered their supply chains too - even cards containing no electronics at all!

Worryingly, that sort of attitude is pretty common, due to (at least in the UK) a legal duty being placed on schools to report suspected ter'rists. That said, I think the idea of further excluding already-lonely students is so stupid that few teachers would entertain it. They may be overworked...

Why jpeg? Wouldn't a lossless compression scheme be more appropriate for pixel art?

Joining the forum years ago seems like an implausibly long setup for a scam, to me. He clearly does have a Pandora to sell (See this thread https://pyra-handheld.com/boards/threads/wtb-1ghz-pandora-300.82674/ ) - so I think it's a bit soon to start calling foul play. Innocent until proven...