Behold The Pancake Bounce

screen-shot-2016-12-24-at-4-00-16-pmI thought some of the viewers might be interested in this fascinating, if not hypnotic, video of a balloon falling on a bed of nails and explaining why it does not burst.

This is the work of first-year science students at Roskilde University on what is known as the “pancake bounce” as described by professor Julia Yeomans and co-workers in Nature Physics.

9 thoughts on “Behold The Pancake Bounce”

  1. Actually, it was not an explanation of why it does not burst. It was using the bed of nails as a model of the super-hydrophobic coating and a demonstration as to why and how a water droplet bouncing off of said coating spreads out less, and bounces off faster than it does off of an uncoated surface. And you can see from the demonstration it is from the capillary action of the coatings and the surface tension if the water (shown by the movement of the surface of the balloon down between the nails – the video at the end shows nail patterns too sparse to do this and they pop the balloon).

    The formulas she discuss have to do with modelling the viscosity of the liquid and the length of the droplet in air as it falls. In this case, the effects of these numbers on there model are relatively negligible given their modelling method and results and may be safely ignored given the results without significantly affecting the outcome.

    I hope that helps.

    Happy Holidays y’all.

  2. I don’t think that Trump got a “Comey” bounce. I think Hillary got deflated because of all the ugly photos of her reading her smart phone with her sunglasses on which were shown all over social media and blogs like this one. A hot air balloon will burst if it gets hit by the right points of view.
    Now that we have the Donald we need to put America First. There needs to be an Executive Order suspending all payments from our government to foreign governments or aid agencies across the pond. All those folks without papers need to be sent back to the place where they were born. If that is Texas then so be it. If that is Mexico then so be that. “Sew Bee It!” That is a new phrase for the new American Way.

  3. I did not understand the formula or the explanation, but I did understand what was happening. I will not be recreating it in my backyard

  4. Porkchop: Are you a Dane? That looks like Danish. Maybe a Danish physicist his having fun again? Its very interesting.

  5. Gosh I’m dumb. I have not idea what that chick was talking about. Nice hair color, though, and accent.

    The last segment had the balloons bursting. Wasn’t the idea at the start that they would not burst? Weren’t we supposed to find out why?

    Oh, well. Maybe this is Jon Turley putting coal in our Christmas eave stockings.

    Or, I’m just dumb.

  6. I think this experiment explains the bounce that Trump received after Comey’s announcements shortly before the election. But it fails to account for the potential Explosive effect if that bounce continues on its present trajectory into a nuclear arms race.

  7. Bubble bounce. The notion was first posed back in 1972 by a guy in Milwaukee who tested condoms and their ability to withstand puncture wounds. So if a kid wanted to have a sibling and put a needle into dad’s condom then there would likely be an unwanted offspring by the mom but the brother would be happy and keep his mouth shut. A whole fourth grade group took this on and there was a spike in births. But there has to be penetration and no bounce. If there is air in the condom and it is like a balloon then it is more likely to puncture. There is a thesis published in a magazine out of Milwaukee about this. Some folks reference the word bounce with the uptake in child birth.

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