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

ACC might let Notre Dame play the 2020 season as a full conference member, report says

first_imgAccording to TMG’s Tony Barnhart, the ACC presidents will meet Wednesday to discuss a trio of scheduling options. Two of the three schedule formats “would bring in Notre Dame as a full member of the ACC for one year only and eligible to play for the conference championship,” per the report.MORE: Why Notre Dame football isn’t in a conferenceBarnhart also reports the ACC is expected to “do away with divisional play and choose the top two teams in the 15-team league (including Notre Dame) to play in the conference championship game.”Notre Dame already has six ACC opponents — Wake Forest, Pittsburgh, Duke, Clemson, Georgia Tech and Louisville — on its 2020 football schedule as part of the school’s contract with the conference. The contract allows Notre Dame to maintain its football independence while all other sports except hockey compete in the ACC.The first (and reportedly least likely) scenario the ACC presidents will consider is the conference’s current schedule (starting Sept. 5) that includes 12 total games and eight conference games. That scenario would leave Notre Dame out as a full member.The second scenario is an 11-game season with 10 conference games and one non-conference game. It would push back the start of the season one week. The third scenario is a nine-game season with eight conference games and one non-conference game, which would push the start of the season back to “around Sept. 26.”Notre Dame has already seen three games wiped away from its 2020 football schedule. When the Big Ten announced it would play the 2020 season with conference games only, the Notre Dame-Wisconsin game that would have been played at Lambeau Field in Green Bay, Wis., was canceled.The Pac-12 made the same move earlier this month, which led to the cancellation of Notre Dame’s football games against USC and Stanford.BENDER: Why Clemson vs. Notre Dame will be so big Notre Dame’s agreement with the ACC, which was established in 2014 and has been extended to last through at least 2037, is such that the Fighting Irish are obligated to play at least five ACC opponents per season in football.The advantages for the ACC are simple: It gets the TV ratings and attendance boosts associated with Notre Dame away games, and if Notre Dame were to give up its football independence, it would be obligated to join the ACC.The advantages for Notre Dame are equally simple: It gets a portion of ACC revenue, participates in the conference’s bowl tie-ins and, perhaps most importantly, preserves its football independence. And in 2020, the deal could be a savior for Notre Dame’s football schedule. As conferences scramble to modify college football schedules in preparation for the 2020 season amid the COVID-19 pandemic, no program’s slate is more up in the air than that of independent Notre Dame.Good thing the school has a one-foot-in, one-foot-out deal with the Atlantic Coast Conference that could serve as a way to rebuild the Fighting Irish’s 2020 football schedule.last_img read more