Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror
×

Comment Re: Project HARP (Score 1) 200

Working backwards, 10 km/s tangential velocity and 5g centripetal acceleration gives a radius of 2000 km, which is O(size of the earth), so simply run a rail gun around the planet. 1000 seconds at 1g tangential acceleration would get you up to speed, at which point you would orbit the (surface of the) earth once every hour or so (if the track went all the way round, but 5000 km of track would suffice).

Comment Re:Quarantine the country dammit. (Score 1) 403

I just looked it up. As of data from three days ago, 68% of the UK is vaccinated.

That's 68% of the entire population, including children under the age of 12 who are not currently being offered a vaccination.

Scotland has vaccinated 90% of those aged 12 and over with at least one dose, while Wales has reached 88%, England 86% and Northern Ireland 83%.

Second doses are also being rolled out, with all nations reaching about 80% of over-12s so far.

Source: https://www.bbc.co.uk/news/hea...

Comment Re:Inaccuracies (Score 1) 48

The contactless payment limit for a physical bank card is UKP 45 in the UK, but limits with an authorised phone app (phone unlocked) may be larger (or unlimited).

The niggle is the contactless limit for a locked phone. Arguably it shouldn't be possible to pay at all, or the limit should be the same as a physical card.

Google Pay says "You can make secure contactless purchases above the UKP 45 limit by just unlocking your phone", while Apple says "You may not be able to use Apple Pay for purchases over GBP 45."

But it evidently is possible to use a locked phone for 'express transit' related transactions, and the article suggests the corresponding Visa limit on iPhone is the unlocked limit, which doesn't seem like a great idea.

Comment Re: UK Stat update (Score 2) 189

The percentage of those hospital who have been vaccinated is a meaningless figure without knowing the distribution in the population at large, since if everybody was vaccinated, all the people hospitalized would have been vaccinated. But there may be fewer people hospitalized than would have been without vaccination.

Slashdot Top Deals

New York... when civilization falls apart, remember, we were way ahead of you. - David Letterman

Working...