Bobby Digital posted:

chitoryu12 posted:

I don’t have homework.

Seriously, adulthood is loving liberating. I spend about as much time at work as I spent in school but I can do anything I want when I leave. I’ve been learning electronics, exercising, making a movie...

chitoryu12 posted:

I did not. I had plans for kids, but that went pretty south a few months ago.

SUPERMAN'S GAL PAL posted:

Benjamin Ferencz: I don't think I'm an idealist. I'm a realist. And I see the progress. The progress has been remarkable. Look at the emancipation of woman in my lifetime. You're sitting here as a female. Look what's happened to the same-sex marriages. To tell somebody a man can become a woman, a woman can become a man, and a man can marry a man, they would have said, "You're crazy." But it's a reality today. So the world is changing. And you shouldn't-- you know-- be despairing because it's never happened before. Nothing new ever happened before.

”... I'm still in there fighting. And you know what keeps me going? I know I'm right.”

Randaconda posted:

https://i.imgur.com/yxqYibs.mp4

Azhais posted:

You want Mike Pences? Cause that's how you get Mike Pences.

Blue Footed Booby posted:

On the other hand if you can't get a car because you have no money and can't hold down a job because you don't have a car, you don't have a lot of other options. Or should that banker have donated that money to mass transit projects?

Cat Hatter posted:

Let's be honest, he didn't catch that kid so much as he broke it's fall. And it didn't look like he fainted so much as he got knocked the gently caress out.

... Which kind of makes it more impressive. Keep on being a good dude, baby cushioning guy.

eating only apples posted:

Not even a baby, but a toddler. Ever been headbutted by a toddler? I have, and I live in fear of getting my teeth knocked out by a kid's skull when they just think they're playing. Guy got hella lucky.

Inceltown posted:

Why not just have it open from both ends to stop the need to rotate it?

Snowglobe of Doom posted:

See also: protest medics. Here's a photo from a few weeks back of some protest medics plugging up a bullet hole in a protester with the shooter standing less than a foot away, still holding the gun and looking for a new target.

Lady Disdain posted:

And yet he flew without them. If that's not majestic, I dunno what the gently caress is.

OwlFancier posted:

Also the you that wakes up when you do sleep is arguably not continuous with the one that had trouble sleeping so that's someone else's problem.

Pookah posted:

Realistically there is no continueity of experience between the you that falls asleep, and the you that wakes up, so in an absolutely pure sense, you cannot declare the one to be the other. However, from an entirely ordinary experience, the chances are 100% that the one is absolutely the other, and pretending that the alternative is the standard default position is both childish and stupid.

thepopmonster posted:

Small problem: you are ~2000 light years away. This means, roughly speaking, you need to maintain an average real-space speed of >12,000 ly/day to keep up.

I thought you needed a hypermassive object and an FTL spaceship but apparently you only need a sufficienly fast FTL spaceship to go back in time? https://www.pbs.org/wgbh/nova/article/can-you-really-go-back-in-time-by-breaking-the-speed-of-light/ or https://arxiv.org/pdf/1505.07489.pdf if you need the detail.

By popular demand posted:

How much could that save in man hours?

OwlFancier posted:

If I found a fossilized wheel made of teeth I would not automatically assume there was originally a shark attached to the end of it.

BOOTY-ADE posted:

Well, you can't spell "cassowary" without "rear end war", so...

Phanatic posted:

Glass is very different from crystal. That's the distinguishing thing about glass, it's a non-crystalline solid. It's essentially all irregularity, with no long-range order at all. Glass doesn't have any natural planes of separation, it fractures conchoidally, and obsidian blades aren't clean perfect edges. They're knapped.

-Zydeco- posted:

A precise application of brute force

ruddiger posted:

Imagine four balls…

DontMockMySmock posted:

To maintain a circular trajectory, an object must have an acceleration towards the center of the circle equal to its speed squared divided by the circle's radius (v²/R). If there's too much acceleration, then the car will fall towards the center of the circle (bad news). Let's consider the most dangerous point, the very top of the loop, where gravity points straight towards the center of the circle. There are two sources of acceleration: gravity and the contact force between the car and the track. The contact force can't pull upwards, though, so at the critical threshold where the car barely makes the loop, it will be zero and gravity will be doing all the work. So we can solve the equation g = v²/R, where g is the acceleration due to gravity on Earth's surface (9.8 m/s² or 32 ft/s²) to find the critical speed v where the car barely is going fast enough to make the loop.

Rearranging that equation, we get v = sqrt(g*R).

Estimating based on the video that the loop is about 3 and a half car lengths in diameter, and using a value I googled of 4.5m for the length of a car, we get v = sqrt(9.8 m/s² * 4.5m * 3.5/2) = 8.8 m/s or 19.7 miles per hour.

This doesn't sound like much, and it isn't! In practice, they probably want to be going a fair bit faster for a healthy safety margin. However, they've also got the problem that as they rise through the loop, they lose speed, or in other words, some of their kinetic energy is converted into gravitational potential energy. Assuming that they don't either lose speed to friction or gain speed from their engine during the loop (a bad assumption but the two effects will at least partially cancel out), we can use conservation of energy to figure out how fast they should be going at the bottom of the loop.

KE_before + PE_before = KE_after + PE_after

1/2 m v[sub[before[/sub]² + m g (0) = 1/2 m v[sub[after[/sub]² + m g h

(We can divide through to cancel the masses; the initial height is zero, the final height will be 3.5 car lengths; the speed after will be our 8.8 m/s.)

1/2 v_before² = 1/2 (8.8 m/s)² + (9.8 m/s²)*(3.5*4.5m)

v_before = sqrt[(8.8 m/s)² + 2*(9.8 m/s²)*(3.5*4.5m)]

which comes out to 19.7 m/s or 44.0 miles per hour.

This is all heavily estimated, of course - this is more of an example than a serious analysis of the video. You could get way more accurate measurements if you opened it up in image-editing software and measured pixels and stuff. I did my best to do a quick-and-dirty measure of their speed in the video and I'd say it looks like they were going about 45-55mph at the bottom, which seems like not a lot of margin for error, so probably the circle was a bit smaller than I was estimating, or maybe they get enough of a boost by gunning the engine through the loop itself. Either way, as you can see from these example numbers, it's surprisingly doable. The hardest part is probably getting their insurance company to sign off on this stunt, as if anything goes wrong, you could have someone in a car falling fifty feet, landing with much more force than a car's roll cage is normally meant to handle. So that's probably one good reason why you don't see this stunt done more often - it's surprisingly easy to do, but dangerous as hell.

Maximum Sexy Pigeon posted:

ACAB, but this is fkn badass

https://twitter.com/LAPDHQ/status/1480363436311670784

Pigsfeet on Rye posted:

https://www.youtube.com/watch?v=iCaQLnR7B10

ElGroucho posted:

Terminus Est

AKA Pseudonym posted:

https://twitter.com/TansuYegen/status/1542752005961256960?t=MspZnwk5FISfI2OlDPu3RQ&s=19