Physics in Action: Barrel Crunch
by Thinkwell
Free
You Might Also Like
-
Physics in Action: Hunter & Monkey -
Physics in Action: A Tug-of-War -
Physics in Action: A Downhill Race -
Physics in Action: Angular Momentum Conservation -
Physics in Action: The Three Balls Demo -
Physics in Action: A Bed of Nails -
Physics in Action: The Triple Chute -
Physics in Action: Buoyancy in Air -
Physics in Action: Resonance -
Physics in Action: Musical Instruments
-
Physics in Action: Musical Instruments -
Physics in Action: Resonance -
Physics in Action: Buoyancy in Air -
Physics in Action: The Triple Chute -
Physics in Action: A Bed of Nails -
Physics in Action: The Three Balls Demo -
Physics in Action: Angular Momentum Conservation -
Physics in Action: A Downhill Race -
Physics in Action: A Tug-of-War -
Physics in Action: Hunter & Monkey -
College Algebra: Solving for x in Log Equations -
College Algebra: Finding Log Function Values -
College Algebra: Exponential to Log Functions -
College Algebra: Using Exponent Properties -
College Algebra: Finding the Inverse of a Function -
College Algebra: Graphing Polynomial Functions -
College Algebra: Polynomial Zeros & Multiplicities -
College Algebra: Piecewise-Defined Functions -
College Algebra: Decoding the Circle Formula -
College Algebra: Rationalizing Denominators
About this Lesson
- Type: Video Tutorial
- Length: 4:30
- Media: Video/mp4
- Posted: 07/01/2009
- Use: Watch Online & Download
- Download: MP4 (iPod compatible)
- Size: 73 MB
This lesson is part of the series: Physics: Fluids, Physics: Fluid Statics, Physics
This lesson was selected from a broader, comprehensive course, Physics I. This course and others are available from Thinkwell, Inc. The full course can be found at http://www.thinkwell.com/student/product/physics. The full course covers kinematics, dynamics, energy, momentum, the physics of extended objects, gravity, fluids, relativity, oscillatory motion, waves, and more. The course features two renowned professors: Steven Pollock, an associate professor of Physics at he University of Colorado at Boulder and Ephraim Fischbach, a professor of physics at Purdue University.
Steven Pollock earned a Bachelor of Science in physics from the Massachusetts Institute of Technology and a Ph.D. from Stanford University. Prof. Pollock wears two research hats: he studies theoretical nuclear physics, and does physics education research. Currently, his research activities focus on questions of replication and sustainability of reformed teaching techniques in (very) large introductory courses. He received an Alfred P. Sloan Research Fellowship in 1994 and a Boulder Faculty Assembly (CU campus-wide) Teaching Excellence Award in 1998. He is the author of two Teaching Company video courses: “Particle Physics for Non-Physicists: a Tour of the Microcosmos” and “The Great Ideas of Classical Physics”. Prof. Pollock regularly gives public presentations in which he brings physics alive at conferences, seminars, colloquia, and for community audiences.
Ephraim Fischbach earned a B.A. in physics from Columbia University and a Ph.D. from the University of Pennsylvania. In Thinkwell Physics I, he delivers the "Physics in Action" video lectures and demonstrates numerous laboratory techniques and real-world applications. As part of his mission to encourage an interest in physics wherever he goes, Prof. Fischbach coordinates Physics on the Road, an Outreach/Funfest program. He is the author or coauthor of more than 180 publications including a recent book, “The Search for Non-Newtonian Gravity”, and was made a Fellow of the American Physical Society in 2001. He also serves as a referee for a number of journals including “Physical Review” and “Physical Review Letters”.
About this Author
-
- Thinkwell
- 1909 lessons
- Joined:
11/13/2008
Founded in 1997, Thinkwell has succeeded in creating "next-generation" textbooks that help students learn and teachers teach. Capitalizing on the power of new technology, Thinkwell products prepare students more effectively for their coursework than any printed textbook can. Thinkwell has assembled a group of talented industry professionals who have shaped the company into the leading provider of technology-based textbooks. For more information about Thinkwell, please visit www.thinkwell.com or visit Thinkwell's Video Lesson Store at http://thinkwell.mindbites.com/.
Thinkwell lessons feature a star-studded cast of outstanding university professors: Edward Burger (Pre-Algebra through...
More..Recent Reviews
This lesson has not been reviewed.
Please purchase the lesson to review.
Recent Comments
This lesson has not been reviewed.
Please purchase the lesson to review.
When you hear about the price of a barrel of oil, this is the kind of barrel they're talking about except we've painted this barrel yellow and red to make it look more colorful. What we've done is put just a little bit of water in the bottom of this barrel. We've connected this barrel to a line of gas. There's a heating element at the bottom and the gas is heating up this small amount of water to produce a lot of steam. So inside this barrel is mostly empty space, a lot of steam and a little bit of water. Why am I doing all of this? Stay tuned. I'll be back in a few minutes and we'll see what happens.
So what happened over here? Well, as I explained before, we have this barrel. We put a little bit of water in it. We heated up the water to create steam, and the steam drove out all the air that was inside. Now, when you saw Roger in the orange suit, what he was doing was capping off this barrel with two little caps, and that made sure that whatever was inside, stayed inside, and no air from the outside got in.
Then what Roger did was very, very important. He took a tank containing liquid nitrogen, which is most of the component of air, and very, very, very cold--liquid nitrogen is extremely cold--and he poured the liquid nitrogen on top of this tank to ensure that this tank cooled down very, very fast. Now, think for a minute. What would happen if you cooled down a tank, which had a lot of steam inside? Well, all the steam is condensed, but since mostly what was inside was just steam anyway, what you're left with is almost nothing. There is almost no air in there, and a very small amount of water vapor, and mostly a vacuum. So what he created in the end was a partial vacuum. Now we had a lot of pressure outside on this drum and very little pressure inside counterbalancing it. What we saw then was that the barrel, as strong as it looks, was not sufficiently strong to withstand the atmospheric pressure outside and it went "crunch."
You can do this demonstration at home yourself without a 55-gallon drum. Just take a soda pop can, empty it out, fill it with a little bit of water, put it over a stove, drive the steam out. And just take that can, invert it upside down in a bowl of water, and you'll see it will go "crunch" as well. That's an easy to do mini-demonstration of what we've seen over here, and you don't need liquid nitrogen to do it.
Fluids
Fluid Statics
Physics in Action: Barrel Crunch Page [1 of 1]
Buy Now and Start Learning
CommunityMore
Embed this video on your site
Copy and paste the following snippet:
Link to this page
Copy and paste the following snippet:

