Recent content by xtempore

I thought so too. I'm working with second-hand information from my brother. Nickel does have a Mohs hardness of 4 though. So it's about the same as steel. Give the shape of the nodules it'd be hard to really exert a good pressure with the blade, and given that they are of roughly equal hardness...

The image and description here probably give a pretty complete answer: https://periodictable.com/Items/028.13e/index.qtvr.html Basically, a by-product of electroplating.

Lol. Yeah, just a lazy copy paste from Google Maps. ;)

Ah, so sorry for the lack of reply! I thought I'd get an email notification when someone commented. :/ Anyway, just got an update from my brother. He says it IS magnetic (as in a magnet is attracted to it). I thought about using Archimedes test as well, but I don't have direct access to it. My...

This object, about the size of a tennis ball was found by my brother. It's metal. It's very hard. Cannot scratch it with a Stanley knife. Cannot break even a small piece off using pliers. Thrown with force at concrete and undamaged. Relatively heavy. My brother estimates similar weight to lead...

I think the picture says it all! As the droplets of condensation reached a certain size they begin to run down the plastic sheet, but rather than just running straight down, they veer off to the left or right. Most of the tracks are at fairly much parallel, with some exceptions, and the pattern...

Oh, that's cool. Thanks for sharing that.

I hope this is okay to ask here. I'm working on a sci-fi short story, and for the purposes of the story I want to have a small ship that maintains its position over a specific location on the Earth's surface. Originally, I thought this would be easy. After all, that's what geostationary...

Not sure about a mathematical proof, but doesn't that formula just state the obvious? Perhaps putting it into words makes it clearer. The expected value of X is the sum of the expected value of X when S happens multiplied by the probability that S happens plus the expected value of X when S...

I was cleaning up the kitchen, and there was a large pot that had been filled with water to soak in the sink. A rectangular nylon pot scrubber was hanging over the side of the pot, about 2/3 in the pot and 1/3 hanging out. As I ran the tap, the pot filled up and overflowed, but even after the...

Can you link to details of the experiments, or perhaps just what I would search for in Google to find some details? Thanks

I apologise in advance for my rather minimal knowledge of physics. Please assume that anything I write below is just my current understanding, and may very well be incorrect... Elementary particles decay into other elementary particles. When a a subatomic particle decays into a pair of other...

I've been looking at some Wave Pendulums on YouTube, and thought it'd be fun to emulate one using HTML5. I got some pretty interesting results, but am looking for suggestions for improvements. Have a look at it here... http://www.keasoftware.com/experiment/pendulum_wave.html A lot of...

Thanks. I think that mostly answers my question. So essentially the whole analog of using water waves is really a very poor example. The minima there are due to a peak and a trough canceling each other out. Whereas with a photon (if I understand correctly) the wave function interferes...

When looking at information about the double-slit experiment, you often see statements like... "the photon interferes with itself". But what does this actually really mean? In the classical analog of waves it's easy to understand that troughs and peaks can cancel each other out. But can...