It was first Aristotle who discovered what is now known as the Mpemba effect: that hot water actually freezes faster than cold water. Scientists have struggled to explain this for years, until recently.
We all know that "water" is made up of two hydrogen atoms and an oxygen atom, more accurately known as H20. Cold water is made up of short hydrogen bonds and long O-H covalent bonds, while the opposite is true for warm water. It is these hydrogen bonds that act weirdly and have drawn the atten
Recently (on a much cooler day), I discovered something while driving to volleyball practice at night. It was chilly so I had the heat on in my car, but just on low. Upon turning on the highway, I suddenly noticed that the heat seemed to have been turned up! That wasn't right, how could it do that on its own?! I double checked it, but the switch hadn't moved; the heat was still on the lowest setting.
So why did it feel like hot air was blowing twice as fast into my face? Well, when I thought
As much as I'd like to tell you I've figured out all the physics of being invisible and how to acquire it as a superpower, I would be lying. To add insult to injury, this post isn't even about the physics of invisibility, but rather about why true invisibility is an impossibility due to the laws of physics. So if you don't want all your dreams of becoming a superhero with powers of invisibility to be crushed, it would be advisible to stop reading here! To everyone sticking around, be prepared to
Hi again, here to talk a little about the physics behind roller coasters!
Something you might not know, or maybe you knew it on some level but never really thought about it - roller coasters aren't propelled along the ups and downs of the ride - they don't use an engine. They're only pulled to the top of the first hill; in order to get through the rest, the carts have to have enough forward momentum to get over the hills and/or through the loops.
It all depends on the conversion of kinet
