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speakeron

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speakeron
·5 माह पहले·discuss
The temperature of the cosmic microwave background can be used as a universal clock.
speakeron
·पिछला वर्ष·discuss
It's actually Act 2, Scene 1 and is spoken by Polonius.
speakeron
·पिछला वर्ष·discuss
Oblate spheroids are round.
speakeron
·पिछला वर्ष·discuss
> Heathrow is massive and uses a lot of power (1-2MWh/day)

It's 3 orders of magnitude more: 1-2GWh/day.

https://www.heathrow.com/content/dam/heathrow/web/common/doc...
speakeron
·2 वर्ष पहले·discuss
Just one ^n. Supermassive black holes are expected to have completely evaporated by 10^100 years.
speakeron
·2 वर्ष पहले·discuss
It's not really whether it makes scientific sense or not, it's just that it's so very highly improbable (really, really improbable) that other explanations make more sense: the video's a fake, it's mass hysteria, or even that we're living in a simulation.
speakeron
·2 वर्ष पहले·discuss
The use of a space as a thousands separator has been around since the 1940s as recommended by the International Bureau of Weights and Measures and it was what we used when I was a kid at school in the UK. They specified it should be a thin (half) space.

https://www.bipm.org/documents/20126/28433818/working-docume...
speakeron
·2 वर्ष पहले·discuss
How can you tell from analysis of the physical circuit what assumptions the designer made about the flow of current? Surely the components (electrolytic capacitors, diodes, transistors, etc) are the same and can only work in one direction. Is it that the ground plane is connected to the positive terminal of the power supply?
speakeron
·7 वर्ष पहले·discuss
Hambini has a good article on this[1]. The basic problem (apart from cost) is that only the ball bearing itself is ceramic; the inner and outer races are made of steel and the ball wears a groove into them which increases friction over time. Near the bottom of the article there's a 'power consumption vs kilometres' chart which illustrates this nicely.

"Hybrid ceramic bearings are the equivalent of trying to run a locomotive on an asphalt road - the hardness differential causes the road (raceway) to become damaged."

[1] https://www.hambini.com/blog/post/ceramic-bearings-vs-steel-...