Mysterious Aluminum Coin Find

What are your top metal detecting finds?

That's a great question, but rather a difficult one to answer.There are different ways at looking at what I would consider to be "best finds" because they fall into different categories, would it be the 18 carat gold ring with 13 magnificent diamonds, or maybe the two and a half thousand coins (many still in old style bank bags and uncirculated) that I found in sand dunes and leaving me with a multitude of unanswered questions such as, we're they proceeds of crime? How long have they been in the ground? Why would someone bury them in the sand dunes miles from anywhere? Etc etc.I have found many beautiful old coins and many "relics" that I treasure, (pardon the pun) the lead horse that I mentioned in an earlier story still fascinates me it stands at 8" tall, and from memory weighs somewhere around two kilograms.I have found many old complete brass artifacts that seem impossible to trace but I'll keep trying.What intrigued me about metal detecting in the first place was a program I saw many years ago from Brittain called "Time Team" where a team of archeologists and enthusiasts would excavate a site within a short time frame, normally 3–5 days and see what they could find. One episode I saw had a guy using a metal detector on the overburden to see if there were any Roman coins or artifacts there. I thought to myself "that looks like fun" and then realised very quickly that not only were there many models and brands of detectors to choose from, but the price of the better ones were beyond my financial capacity at the time.I decided to sell some power tools that sat in my workshop unused for years, which gave me just enough to purchase a Garrett metal detector that was popular at the time. Within a short amount of time I had saved up enough money that I had found with this machine that I was able to upgrade to the next model, it meant also selling the detector I had but it had paid for itself in a matter of months.Many years later I now have six machines, three of which are the top of the range for my type of detecting. I have mentioned all this regarding my metal detectors because I really feel that maybe they rank up there with the best of my finds. Cheers.

How can you tell if the penny is aluminum?

One way is to compare densities. If you have a penny that you know is not aluminum and a mystery penny, balance the two at opposite ends of a little stick (popsicle stick?). If the balance is at the mid-point, they are made of the same metal.The test will not determine if it is aluminum, but it will determine if it is ‘abnormally light’.

What would we observe if a strip of zinc was dipped in a solution of copper sulphate?

Copper sulphate is blue in color, when zinc strip is dipped solution displacement reaction takes place because zinc is more reactive than Copper so zinc displace Copper from its sulphate solution and the solution became colorless as it now zinc sulphate solution and Copper stick on the zinc strip

Why is the value of bitcoin skyrocketing even though quantum computing in the future will make them worthless?

Who cares what it may be worth in the future? No currency actually has any value. Its value is only in what you can buy with it, and in a famine a piece of bread will buy a bag of gold, as the saying goes. So the users of Bitcoin value them for what they will buy today, not as some secure store of future value.It’s not like values don’t change, anyway. In the 19th Century the metal aluminum rocketed in value too, reaching the point that the honored guests of kings and emperors were served food on aluminum plates with aluminum silverware, while ordinary guests had to make do with gold. The US Congress decided to cap the Washington Monument with aluminum to show how wealthy and powerful the country had become. Then the Hall–Héroult process was discovered, and anyone who had hoarded the metal as a store of value looked a bit green.In any case, perhaps nobody now living will survive to see quantum computing become an everyday reality. It hardly seems a thing worth worrying about.

Is free energy generation possible using magnets and a copper coil?

Notwithstanding all the documentation available about magnets many non-technical people still perceive magnets as mysterious objects containing unlimited energy, thus opening the door towards the mythical perpetual motion and free energy generation.Magnets can only generate static fields. Also, their polarity cannot be reversed.If only magnets are used in both the stator and rotor of a motor, almost immediately the motor locks. Even though we place the magnets of the stator in such a way they initially repel the magnets of the rotor, after a fraction of rotation the magnetic forces reach an equilibrium and the shaft stops rotating. We can try to change the number of magnets used in the stator and rotor, their position, orientation, and strength, but the result is still the same: the magnetic forces reach an equilibrium and the shaft does not rotate any more.This issue can be solved by using electromagnets besides magnets or by just using electromagnets.For instance, we can use magnets in the stator and electromagnets in the rotor. If the voltage source is DC, we need also to introduce a mechanism to power the electromagnets in such a way that while the rotor turns, they always repel the magnets in the stator. Obviously we no longer have a free energy motor, but just an ordinary motor which needs an external source of energy to work.