Science group demonstrates uses of fire, ice in hands-on performance

first_imgLucas Masin-Moyer | The Observer Graduate student Craig Reingold performs an experiment using an electric guitar and fire during Tuesday’s “Our Universe Revealed” lecture series installment, which engages audiences with science.Throughout the academic year, Notre Dame’s physics department has brought science to the public with a series of events titled “Our Universe Revealed.”The ExPAND demo team, made up of physics graduate students Adam Clark, Austin Nelson, Craig Reingold and Allan Leishman, presented the next installment in this series, “A Show of Fire and Ice,” on Tuesday evening in Jordan Hall of Science.Clark kicked off the event by starting a massive fire with a few simple ingredients.“[I used] just non-dairy coffee creamer,” he said. “So by spreading it out, it increased the amount of oxygen gas that was available to be burned and we got the spectacular flame. You might have seen this before … the people that do pyrotechnics for [action] movies use principles like this to get that large, satisfying fireball.”The next demonstration of fire was conducted by Nelson, who created what he called a “fire tornado.”“What we do is put this cage on and what that does is swirl the air for us, it gives the air particles spin — what we like to call angular momentum,” he said. “So the air is swirling around inside and the fire has nowhere to go but in and up.”This tornado was the highlight for three children attending the event — Ramon, Thomas and Eleanor Veselik.“[I loved] when they turned the fire green,” Ramon Veselik said.Their mother, Anne Veselik, said the event provided a great learning opportunity.“Science is alway fascinating and it’s cool to get to see it hands-on and things you can’t do at home,” she said.After the fire tornado, Reingold did some further tests with a Ruben tube and a guitar.“What I have here is a long tube filled with propane … there are tiny holes cut in the top,” he said. “However, I have a speaker and play sound waves through [the tube], I can actually visualize the sound wave … as I make the notes lower, the wavelength gets longer — the big pockets of flame move further apart and as the notes get higher, the wavelength will get shorter.”After these experiments with fire, the team moved on to experimenting with ice, particularly with liquid nitrogen — Nelson’s “favorite thing to play with.”“Liquid nitrogen is a lot colder than ice … so we’re going to dip stuff inside of it, because we’re scientists and that’s all science is — dipping stuff in liquid nitrogen,” Reingold said.The demo team proceeded to drop a rose, tennis ball, racquetball, ping pong ball and balloon into the liquid nitrogen.The balloon yielded a particularly interesting result, Nelson said.“What’s happening is that we’re taking all the air inside the balloon and making it very, very cold so it condenses in on itself and if we allow the air to heat up the balloon will re-inflate,” he said. “So if you ever want to have a party and have a lot of balloons, you can save them by just freezing them in liquid nitrogen.”Leishman finished off the event with a demonstration of superconductors, using the magnetic properties of superconductors to levitate a small rock.“A superconductor is — short story — is a material that can conduct electricity without any watts,” he said. “The problem is that, like how ice has to be frozen below 32 degrees to be solid, superconductors have to be really cold to be superconducting … luckily we have material on this stage that can do that. Liquid nitrogen can get down to negative 321 degrees Fahrenheit and so it’ll take us below that threshold.”The next installment of “Our Universe Revealed” will be held May 16 in Jordan Hall and will be a hands-on exploration of particle physics.Tags: ExPAND Demo Team, Our Universe Revealed, Physicslast_img read more

Coronavirus: EPL clubs ‘to play remaining 92 games behind closed doors’

first_imgPremier League clubs have reportedly hatched a plan to save the season amid the coronavirus pandemic – by playing all remaining games behind closed doors and at neutral venues. All games would also be shown live on TV in a bid to provide fans with their football fix and appease broadcasters who have paid huge sums to show Premier League football. Clubs are to present their plan for fulfilling all remaining games at Thursday’s Premier League meeting At Tuesday’s UEFA summit, Europe’s leagues were given until June 30 to complete their fixtures, with the European Championship finals pushed back until next year to accommodate domestic football. But Premier League clubs fear they still not will not be able to fulfil their fixtures in time, as they have more still to play than in other European leagues and uncertainty still looms over when games will be able to go ahead. League bosses are also concerned about a potential breach of the division’s £3bn television contract if the season is not completed. Now a group of Premier League clubs has come up with a radical plan to ensure all fixtures can be played, according to The Sun. The plan – which the publication says will be put before Thursday’s Premier League meeting – would see all 92 remaining matches played behind closed doors, with all games broadcast live on television. Games would be played at a minimal number of venues to keep down the number of police and medical staff needed, and they would most likely be played around the Midlands to ensure as little travel as possible. Venues could stage more than one game per day, with clubs potentially having to play every three days in order to fulfil all their fixtures. The rational behind matches being played at neutral venues would be to prevent home fans from turning up outside the stadium, as happened at the Champions League clash between Paris-Saint Germain and Borussia Dortmund last week. Paris Saint-Germain fans turned up at the stadium for last week’s Champions League win over Borussia Dortmund, which was played behind closed doors Liverpool need to win just two more games to be confirmed as champions for the first time in 30 years – but there are also the European places and relegation to be sorted out, as well as promotion from the Championship. Most Premier League teams have nine games remaining, but Manchester City, Sheffield United, Arsenal and Aston Villa each have 10 left to play. There are also FA Cup matches to play, as well as the remainder of the Champions League and Europa League competitions. FacebookTwitterWhatsAppEmail分享 Loading… center_img Promoted Content6 Major TV Characters We Were Relieved To See Leaving The ShowNo Good Disney Role Models For Boys?6 Incredibly Strange Facts About Hurricanes8 Things You Didn’t Know About CoffeeMind-Bending Technology That Was Predicted Before It AppearedWhat Happens To Your Brain When You Play Too Much Video Games?7 Facts About Black Holes That Will Blow Your MindWhat Is A Black Hole In Simple Terms?Which Country Is The Most Romantic In The World?5 Of The World’s Most Unique Theme Parks11 Most Immersive Game To Play On Your Table Top6 Ridiculous Health Myths That Are Actually Truelast_img read more