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+ - Some raindrops exceed their terminal velocity->

Submitted by sciencehabit
sciencehabit (1205606) writes "New research reveals that some raindrops are “super-terminal” (they travel more than 30% faster than their terminal velocity, at which air resistance prevents further acceleration due to gravity). The drops are the result of natural processes—and they make up a substantial fraction of rainfall. Whereas all drops the team studied that were 0.8 millimeters and larger fell at expected speeds, between 30% and 60% of those measuring 0.3 mm dropped at super-terminal speeds. It’s not yet clear why these drops are falling faster than expected, the researchers say. But according to one notion, the speedy drops are fragments of larger drops that have broken apart in midair but have yet to slow down. If that is indeed the case, the researchers note, then raindrop disintegration happens normally in the atmosphere and more often than previously presumed—possibly when drops collide midair or become unstable as they fall through the atmosphere. Further study could improve estimates of the total amount of rainfall a storm will produce or the amount of erosion that it can generate."
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Comment: Re:Can it scram in 10 seconds? (Score 1) 216

In fact it's the opposite problem: spent fuel pools were ok, but the folks at Fukushima didn't know it and wasted a lot of time and man power trying to correct a non-existent problem. But your point is still good. Without cooling even the spent fuel pool will boil away after awhile (days? weeks?) and the bare fuel could melt down.

Comment: Re:CS Core Curriculum? (Score 1) 329

by NitsujTPU (#47744311) Attached to: ACM Blames the PC For Driving Women Away From Computer Science

Where did you go that theory *wasn't* part of your core?

Also worth noting is that the reason that we teach so much programming is because that's the job associated with the degree. If you don't plan on programming with your degree in computer science, then you'd probably better plan on some graduate school. I suppose you could treat it as an, "I just needed a degree" subject, but it's a lot of work if all you're after is the ability to say that you finished your BS.

Comment: Re:Can we rid the word of "Gelling"? (Score 4, Insightful) 127

by JanneM (#47682897) Attached to: Switching Game Engines Halfway Through Development

One function of special vocabulary is for specialists to easily communicate. But another, important, social function is as a badge of in-group membership. If you use the words correctly (from the point of view of the group) you show that you belong, and that you probably know and understand all the other explicit and implicit rules of the group. If the word use spreads too far it loses this function and the group needs to find new words and expressions instead.

You dislike "gelling". You dislike "paradigm shifts". It would probably be a fairly risk-free bet on what you think of expressions like "optics" (as in "the optics of this decision is good") and the like. You dislike these words and refuse to use them. Which signals to management people that you are not management and should not be treated as part of their in-group. "gelling" works exactly as intended, in other words.

Asking for words to not be used like this is futile. It would be like asking people to no longer care about fashion (another in-group signal) or to not form groups of like-minded people at all.

Comment: Re:What are they complaining about? (Score 1) 341

by JanneM (#47676017) Attached to: Berlin Bans Car Service Uber

Not many other countries intentionally bankrupt accident victims the way the US does.

I don't live in the US, and I agree. But, if you're found liable for an accident you will tend to pay a lot of money in any country; the accident victims likely have life or accident insurance and their insurance company will want to get reimbursed.

So good, comprehensive accident insurance is a very good idea no matter where you live. Usually we have that as part of our home insurance or other thing like that, and if you own a car you have mandatory insurance for that.

But in a case like this you may well be completely uncovered. The vehicle insurance is likely not valid for commercial traffic, and your home insurance may well not be valid either. As I said, I would never, ever get into a car like this without first being absolutely sure that the liability situation is crystal clear.

"The value of marriage is not that adults produce children, but that children produce adults." -- Peter De Vries

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