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

Personal rainforest retreat offers organic lifestyle

first_img497 & 501 Mount Warning Rd, Mount Warning.This 200 acre property, which includes two separately owned blocks of 100 acres each, is at the entrance to world heritage listed Wollumbin National Park.Located on Mt Warning Road in the Tweed Shire in northern NSW, the property is largely untouched and includes its own water source.More from news02:37Purchasers snap up every residence in the $40 million Siarn Palm Beach North4 hours ago02:37International architect Desmond Brooks selling luxury beach villa1 day ago 497 & 501 Mount Warning Rd, Mount Warning.Gabriela Soelkner, who owns one of the properties, said the property was a lifestyle block offering the opportunity for an “organic way of life”.“The property is perfectly set up for someone to create their own peaceful retreat,” Ms Soelkner said.“It’s close enough to town to have access to all the modern facilities, but far enough away to provide a secluded, quiet and pure organic lifestyle.“The volcanic soil is ideal for living off the land and growing your own fruit and vegetables and the running creek provides a never ending, completely natural water source.” 497 & 501 Mount Warning Rd, Mount Warning.FANCY a tree change?Enjoy fresh air, nature, wildlife, bush walks and creek swimming in this sprawling rainforest retreat which has hit the market.center_img 497 & 501 Mount Warning Rd, Mount Warning.Ms Soelkner, who has lived on the property for more than 35 years, said her days normally started with a bush walk and, in summer, end with a dip in one of the freshwater creeks.Savills Gold Coast director Christopher Jones is marketing the property and said it provided the seclusion of a remote location without the inconvenience of living too far from town.The properties, which have been owned by the same family since 1979, are home to a character laden studio situated among old rock terraced gardens that blend into the rainforest.Sealed roads lead into the two properties, which can be purchased as a total 200 acres, or as individual 100 acre lots.last_img read more