Daily News | ‘Philly Materials Day’ returned with cool looks at how stuff is made
Raid Usher, 8, listens to a presentation about piezoelectric effect during Philly Materials Science and Engineering Day at Drexel University in Philadelphia on Saturday.Jake Vandermeulen, 10, was amazed at how he was able to walk so effortlessly across the fluid’s surface.
On Saturday, Drexel University’s department of Material Sciences and Engineering hosted Philly Materials Science and Engineering Day — or Philly Materials Day — for the first time since February 2020. The event was four hours of hands-on demonstrations for people of all ages to learn about material sciences and engineering.
Late Saturday morning, families packed the Mitchell Auditorium as Drexel students showed them how liquid nitrogen worked and what it does to the physical environment. With a boiling point of minus-320.4 degrees Fahrenheit, liquid nitrogen would freeze most materials instantaneously. As the demonstration began, two students poured liquid nitrogen out of a Dewar flask onto a fully inflated balloon, and the audience gasped as the balloon immediately shrank. When students asked the audience who wanted to smash frozen rubber bands, more than 20 kids rushed the stage to try it out.At a table where Prajal Nautiyal was demonstrating how friction works, Maurizio Rodriguez, 11, spun the wheel on a bicycle, as it glided in a circle unhindered.
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