A couple of days ago I wrote about
a Google employee who mashed together 250 lbs of Silly Putty and then had a hard time breaking it up into chunks.
Today Dr. Paul J. Camp, from the Department of Physics at Spelman College in Atlanta, GA emailed me to say:
"I guess they didn't try smacking it with a hammer.
"Silly Putty is a bizarre polymer, but like most polymers it has a transition temperature at which its physical properties change. In this case, there is a glass transition temperature (Tg) -- below Tg, the polymer will behave like a glass and shatter on impact instead of deforming. For example, PVC has a Tg of 83 C which makes it a reasonable choice for cold water pipes but not for hot water, which would cause it to flow like Silly Putty (addition of various plasticizers can adjust the Tg). However, often the viscoelastic properties of polymers have a rate dependence and this is the case for Silly Putty. Do the same amount of work over a much shorter time (smack it with a hammer instead of pulling) and the SP behaves as if its Tg has been raised. It then shatters into bits.
"You can read a mildly confusing scientific explanation here (from Case Western) along with pictures of Silly Putty subjected to the same force at different rates, or if you prefer a more visceral experience, watch the video from this experiment of what happens when you drop a 50 pound beach ball made of Silly Putty off the roof of a building."
Where are our petabyte drives? Brian Hayes takes us through the reasons storage is “stuck” in the low terabytes. The tl;dr is that we got such exceptional capacity growth in the late 90s and early 00s we don’t need much more right now, so the focus since then has been on SSDs, networking, interfaces, etc, […]
Amélie Lamont, a former staffer at website-hosting startup Squarespace, writes that she often found herself disregarded and disrespected by her colleagues. One comment in particular, though, set her reeling — and came to exemplify her experiences there.
In this episode of the Flash Forward podcast we travel to a future where humans have decided to eradicate the most dangerous animal on the planet: mosquitos. How would we do it? Is it even possible? And what are the consequences? Flash Forward: RSS | iTunes | Twitter | Facebook | Web | Patreon We […]
We’d all love a 75-inch TV screen on which to view our favorite shows. But not all of us can drop the cash needed to get one of those broadcasting beauties (or even have the space needed to house them).Thankfully, there’s an alternative. With the SainSonic Mini LED Portable Projector (only $59.99 in the Boing Boing Store), you can project a picture […]
If you want to add some real firepower to your programming repertoire, learn Java–one of the most adaptable, widely-used programming platforms around. You can easily do that with this Ultimate Java bundle, now just $69 in the Boing Boing Store.Across 14 lectures and 117 hours of content, the educators at online academy eduCBA will walk you through […]
Every company wants to harness the power of social media, but few understand how to make that happen. Be one of those select few with this Social Media Marketing Course & Certification package, now just $29 in the Boing Boing Store.Over 12 modules of course material, you’ll learn what it takes to increase a brand’s […]