resonator

sekkiera  asked:

So, our physics teacher has the strange idea of motivating his students by letting each of us present a physical phenomenal we find interesting to our classmates in a 5-minutes-presentation. And now I need something that is interesting for everyone - even people that usually don't care for physics -, but has interesting facts for someone who's interested in it, too (preferably with an easy experiment). You don't happen to have any ideas, do you?

First of all, your professor is awesome for taking the time to do this. Of the top of my mind, the best one I have is Chladni figures.

Basically take a flat metal plate, fix it at the center and spray some fine sand particles on it.

Using a violin bow, gently excite any edge of the plate to magically witness these beautiful normal mode patterns ( known as Chladni patterns/figures ) forming on the plate.

Also notice that by pinching the plate at different points, the pattern obtained changes.

There is a whole lot of physics that goes behind such a simple phenomenon and I dare say we understand it completely. There are lots of questions on these figures that we have no answer for!

Hope this helps with your presentation. Have a good one!

Gif source video: Steve Mould

Underrated animes I think the signs would love

I love every one of these animes tbh


Aries: Kekkai Sensen - 12 Episodes (2nd season of same length coming out Oct 2017)

Supersonic monkeys, vampires, talking fishmen, and all sorts of different supernatural monsters living alongside humans—this has been part of daily life in Hellsalem’s Lot, formerly known as New York City, for some time now. When a gateway between Earth and the Beyond opened three years ago, New Yorkers and creatures from the other dimension alike were trapped in an impenetrable bubble and were forced to live together. Libra is a secret organization composed of eccentrics and superhumans, tasked with keeping order in the city and making sure that chaos doesn’t spread to the rest of the world.

Pursuing photography as a hobby, Leonardo Watch is living a normal life with his parents and sister. But when he obtains the “All-seeing Eyes of the Gods” at the expense of his sister’s eyesight, he goes to Hellsalem’s Lot in order to help her by finding answers about the mysterious powers he received. He soon runs into Libra, and when Leo unexpectedly joins their ranks, he gets more than what he bargained for. Kekkai Sensen follows Leo’s misadventures in the strangest place on Earth with his equally strange comrades—as the ordinary boy unwittingly sees his life take a turn for the extraordinary.

Originally posted by pinkishrabbit


Taurus: Mushishi - 46 Episodes (2 seasons)

“Mushi”: the most basic forms of life in the world. They exist without any goals or purposes aside from simply “being.” They are beyond the shackles of the words “good” and “evil.” Mushi can exist in countless forms and are capable of mimicking things from the natural world such as plants, diseases, and even phenomena like rainbows.

This is, however, just a vague definition of these entities that inhabit the vibrant world of Mushishi, as to even call them a form of life would be an oversimplification. Detailed information on Mushi is scarce because the majority of humans are unaware of their existence.

So what are Mushi and why do they exist? This is the question that a “Mushishi,” Ginko, ponders constantly. Mushishi are those who research Mushi in hopes of understanding their place in the world’s hierarchy of life.

Ginko chases rumors of occurrences that could be tied to Mushi, all for the sake of finding an answer.

It could, after all, lead to the meaning of life itself.

Originally posted by macross


Gemini: Psychic Detective Yakumo - 11 Episodes

Haruka Ozawa’s sophomore year is getting seriously scary. One of her friends is possessed, another has committed suicide and Haruka could be the next one to flunk the still-breathing test. Her only way out of this potentially lethal dead end? Yakumo Saito, an enigmatic student born with a mysterious red eye that allows him to see and communicate with the dead. But the deceased don’t always desist and some killers are more than ready to kill again to keep dead men from telling any more tales. That doesn’t stop Haruka’s knack for digging up buried secrets, and there’s even more evidence of bodies being exhumed by both Yakumo’s police contact and an investigative journalist with a newly made corpse in her closet! Can this pair of anything but normal paranormal detectives solve the ultimate dead case files or will they end up in cold storage themselves? 

Originally posted by fl-uttershy


Cancer: Is this a Zombie? - 22 Total Episodes (2 Seasons)

Not every zombie is the monstrous, brain-eating type.

One night while walking home from the convenience store, regular high school boy Ayumu Aikawa is killed by a serial killer, and is just as suddenly brought back to life by a necromancer named Eucliwood Hellscythe. One small caveat: he’s now a zombie. Things get even weirder for him when he accidentally steals a magical girl’s uniform, and thus her powers! Haruna, the ex-magical girl, orders him to fight evil creatures known as Megalo in her place until they can figure out a way to get her powers back to her.

Originally posted by koritsu-shita-mura


Leo: Parasyte - 24 Episodes

All of a sudden, they arrived: parasitic aliens that descended upon Earth and quickly infiltrated humanity by burrowing into the brains of vulnerable targets. These insatiable beings acquire full control of their host and are able to morph into a variety of forms in order to feed on unsuspecting prey.

Sixteen-year-old high school student Shinichi Izumi falls victim to one of these parasites, but it fails to take over his brain, ending up in his right hand instead. Unable to relocate, the parasite, now named Migi, has no choice but to rely on Shinichi in order to stay alive. Thus, the pair is forced into an uneasy coexistence and must defend themselves from hostile parasites that hope to eradicate this new threat to their species.

Originally posted by 97mika


Virgo: Terror in Resonance - 11 Episodes

Painted in red, the word “VON” is all that is left behind after a terrorist attack on a nuclear facility in Japan. The government is shattered by their inability to act, and the police are left frantically searching for ways to crack down the perpetrators. The public are clueless—until, six months later, a strange video makes its way onto the internet. In it, two teenage boys who identify themselves only as “Sphinx” directly challenge the police, threatening to cause destruction and mayhem across Tokyo. Unable to stop the mass panic quickly spreading through the city and desperate for any leads in their investigation, the police struggle to act effectively against these terrorists, with Detective Kenjirou Shibazaki caught in the middle of it all.

Zankyou no Terror tells the story of Nine and Twelve, the two boys behind the masked figures of Sphinx. They should not exist, yet they stand strong in a world of deception and secrets while they make the city fall around them, all in the hopes of burying their own tragic truth.

Originally posted by nekoksyo


Libra: No Game No Life - 12 Episodes

No Game No Life is a surreal comedy that follows Sora and Shiro, shut-in NEET siblings and the online gamer duo behind the legendary username “Kuuhaku.” They view the real world as just another lousy game; however, a strange e-mail challenging them to a chess match changes everything—the brother and sister are plunged into an otherworldly realm where they meet Tet, the God of Games.

The mysterious god welcomes Sora and Shiro to Disboard, a world where all forms of conflict—from petty squabbles to the fate of whole countries—are settled not through war, but by way of high-stake games. This system works thanks to a fundamental rule wherein each party must wager something they deem to be of equal value to the other party’s wager. In this strange land where the very idea of humanity is reduced to child’s play, the indifferent genius gamer duo of Sora and Shiro have finally found a real reason to keep playing games: to unite the sixteen races of Disboard, defeat Tet, and become the gods of this new, gaming-is-everything world.

Originally posted by medusalily


Scorpio: Rurouni Kenshin - 95 Episodes 

In the final years of the Bakumatsu era lived a legendary assassin known as Hitokiri Battousai. Feared as a merciless killer, he was unmatched throughout the country, but mysteriously disappeared at the peak of the Japanese Revolution. It has been ten peaceful years since then, but the very mention of Battousai still strikes terror into the hearts of war veterans.

Unbeknownst to them, Battousai has abandoned his bloodstained lifestyle in an effort to repent for his sins, now living as Kenshin Himura, a wandering swordsman with a cheerful attitude and a strong will. Vowing never to kill again, Kenshin dedicates himself to protecting the weak. One day, he stumbles across Kaoru Kamiya at her kendo dojo, which is being threatened by an impostor claiming to be Battousai. After receiving help from Kenshin, Kaoru allows him to stay at the dojo, and so the former assassin temporarily ceases his travels.

Rurouni Kenshin: Meiji Kenkaku Romantan tells the story of Kenshin as he strives to save those in need of saving. However, as enemies from both past and present begin to emerge, will the reformed killer be able to uphold his new ideals?

Originally posted by nenecchi

+ 3 of the most badass live action movie adaptations

Originally posted by takeruandcaterpillars


Sagittarius: Nurarihyon no Mago - 48 Total Episodes (2 Seasons)

Rikuo Nura doesn’t want anything to do with evil youkai, and just wants a normal life. Too bad he’s a quarter youkai, and Nurarihyon, his grandfather, is insistent that he takes over as head of the Nura Clan. He’s able to keep his supernatural secret life hidden from his classmates, as he can only transform into a youkai at night, for six hours at a time.

Unfortunately for him, various youkai factions are out to target both his youkai and human friends, and like it or not, he needs to embrace his youkai side. Life is not easy when you’re Nurarihyon’s grandson

Originally posted by bambina97


Capricorn: Hamatora - 24 Total Episodes (2 Seasons)

The ability to create miracles is not just a supernatural phenomenon; it is a gift which manifests in a limited number of human beings. “Minimum,” or small miracles, are special powers that only selected people called “Minimum Holders” possess. The detective agency Yokohama Troubleshooting, or Hamatora for short, is composed of the “Minimum Holder PI Duo,” Nice and Murasaki. Their office is a lone table at Cafe Nowhere, where the pair and their coworkers await new clients.

Suddenly, the jobs that they begin to receive seem to have strange connections to the serial killer whom their friend Art, a police officer, is searching for. The murder victims share a single similarity: they are all Minimum Holders. Nice and Murasaki, as holders themselves, are drawn to the case—but what exactly is the link between Nice and the one who orchestrates it all?

Originally posted by hentaikohai


Aquarius: Trigun - 26 Episodes

Vash the Stampede is the man with a $$60,000,000,000 bounty on his head. The reason: he’s a merciless villain who lays waste to all those that oppose him and flattens entire cities for fun, garnering him the title “The Humanoid Typhoon.” He leaves a trail of death and destruction wherever he goes, and anyone can count themselves dead if they so much as make eye contact—or so the rumors say. In actuality, Vash is a huge softie who claims to have never taken a life and avoids violence at all costs.

With his crazy doughnut obsession and buffoonish attitude in tow, Vash traverses the wasteland of the planet Gunsmoke, all the while followed by two insurance agents, Meryl Stryfe and Milly Thompson, who attempt to minimize his impact on the public. But soon, their misadventures evolve into life-or-death situations as a group of legendary assassins are summoned to bring about suffering to the trio. Vash’s agonizing past will be unraveled and his morality and principles pushed to the breaking point.

Originally posted by heavycrumplt


Pisces: Gangsta. - 12 Episodes

Nicholas Brown and Worick Arcangelo, known in the city of Ergastalum as the “Handymen,” are mercenaries for hire who take on jobs no one else can handle. Contracted by powerful mob syndicates and police alike, the Handymen have to be ready and willing for anything. After completing the order of killing a local pimp, the Handymen add Alex Benedetto—a prostitute also designated for elimination—to their ranks to protect her from forces that want her gone from the decrepit hellhole of a city she has come to call home. However, this criminal’s paradise is undergoing a profound period of change that threatens to corrode the delicate balance of power.

Ergastalum was once a safe haven for “Twilights,” super-human beings born as the result of a special drug but are now being hunted down by a fierce underground organization. This new threat is rising up to challenge everything the city stands for, and the Handymen will not be able to avoid this coming war.

Originally posted by chunli

3

In their newest video, the Slow Mo Guys recreated one of my favorite effects: vibration-driven droplet ejection. For this, they use a Chinese spouting bowl, which has handles that the player rubs after partially filling the bowl with water. By rubbing, a user excites a vibrational mode in the bowl. Watch the GIFs above and you can actually see the bowl deforming steadily back and forth. This is the fundamental mode, and it’s the same kind of vibration you’d get from, say, ringing a bell. 

Without a high-speed camera, the bowl’s vibration is pretty hard to see, but it’s readily apparent from the water’s behavior in the bowl. In the video, Gav and Dan comment that the ripples (actually Faraday waves) on the water always start from the same four spots. That’s a direct result of the bowl’s movement; we see the waves starting from the points where the bowl is moving the most, the antinodes. In theory, at least, you could see different generation points if you manage to excite one of the bowl’s higher harmonics. The best part, of course, is that, once the vibration has reached a high enough amplitude, the droplets spontaneously start jumping from the water surface! (Video and image credits: The Slow Mo Guys; submitted by effyeah-artandfilm)