Categories
geek learn science tech

Solar System in an amazing 360 video


The guys at Crash Course have created an amazing 360 video animation where we can learn more about our solar system. What’s a 360 degree video, you ask? It is a video in which you can rotate around and see other perspective while the video is still running.

If movies would have such a 360 degree video, then you may be able to see the cameras rolling while the actors do their thing. Just kidding. A great concept applied to a science video. Neat.

Categories
geek learn science

What would happen if all the planets would align?


Nothing. Almost nothing. No earth quakes, no tidal waves. The influence of other planets on Earth would be so small that that they would be impossible to see. The Moon has more influence over our tidal waves than even the Sun.

Actually, the Moon has 3x more stronger tidal force than the Sun and tens of thousands of time than Jupiter or Saturn. Due to the high distance to the planets an alignment cannot influence anything on Earth. The last question in the video is quite interesting: what if you replace the Moon with Jupiter. Then the tidal forces would be so high on Earth that we would have volcanic activity and tidal waves like it crazy and it is doubtful we would have a nice life in here.

Mystery solved.

Categories
entertainment geek science

What f the Moon where at the distance the ISS is?


The Moon is at about 384000 km distance from Earth. That’s a pretty big distance and it tidaly locked with our planet so that it will alwyas show the same face to our planet and, because of this, the time it takes to revolve around itself is equal to the time it takez to amke one turn around Eart.

If the Moon would be at the distance the IS is, which is about 340 km high, then the video from above would display how the Moon looks like just before it would be shredded to pieces. At that distance or even more, an object the size of the Moon would be shredded to pieces by Earth gravity. We would have quite a lot of rings because of this.

Via Presurfer.

Categories
geek learn science

Why does the Earth keep spinning?


The answer can be simple: because things in motion stay in motion. First law of motion from Newton. It is all about inertia: hen you set things in motion, if there are no forces acting upon an object, that object stays in motion.

Once an object is moving you do not need a force to keep that object moving. On Earth the friction with ground or air will stop the object from moving, but not in space. The same holds true for spinning objects. Get a spinner spinning and put it in a vacuum room and levitating using some magnets and you will see that spinner spinning for a long time.

Nick Lucid explains it more intelligently and with formulas too. What’s not to love when it comes to physics? Nothing.

Categories
geek learn science tech

Can you see molecular bonds? IBM says yes.

IBM is mostly interested in finding new ways to build a processor or a storage medium instead just pure physics knowledge. They were able to image the bonds that can be seen in molecules and were also able to steal electrons from the molecule in order to change its type.

In the papaer publicshed in Nature Cemistry under DOI: 10.1038/NCHEM.2438 IBM researchers, in collaboration with CiQUS at the University of Santiago de Compostela, have observed the rearrangement reaction known as a Bergman cyclisation – which was first described in 1972 by American chemist Robert George Bergman.

The abstract says:

“Here we demonstrate a reversible Bergman cyclization for the first time. We induced the on-surface transformation of an individual aromatic diradical into a highly strained ten-membered diyne using atomic manipulation and verified the products by non-contact atomic force microscopy with atomic resolution.”

Which simply means that they were able to manipulate atoms in order to change the configuration of a molecule. Simply put, this is awesome. It is not the first time, but it has one of the simplest explanatory videos out there. Good on you, IBM.

Categories
geek science tech

A phone battery has an energy equivalent to 40 .44 Magnum bullets


Now, that is something new, but the fact that a phone battery can hurt you is not new. Do NOT ever, under any circumstances breck the battery apart. Since it has compounds of lithium in it and since lithium is very reactive with air, the batter will start burning and will explode.

The energy stored in a battery is the same as the one from 40 .44 Magnum bullets. The word says that such a bullet can rip you head off, but closer to the truth would be that it will rip a part of you head off. The same with the battery: it can burn and hurt you if you are not careful enough. Also, try not to speak at the phone while the phone is charging.

Categories
geek learn science

Arabic numbers: why are they shaped like that?

cifre-indiene-unghiuri
In the image from above you can see why the numbers are looking the way they look now. We can say that we chose style over function, but you get the idea. Number one should have only one angle, number two should have two angles and number three should have four angles.

Today we do not use that exact notation, but at least we can understand now why the numbers are shaped like that. Clever guys those Indians and clever guys those Arabs who brought these numbers over to us. Roman numbers are awful to work with.
Image via.

Categories
geek learn science

Medical Tuesday: probiotics, aspirin, and metal vs. bacteria


You guys know that I, the one man blogger-army on TGT, like to learn a lot of stuff. And stuff is enough on the web. Today we’ll learn a couple of things from the medical world namely, that probiotics are good only when you had issues with diarrhea after an antibacterial treatment, and that you should not put too much faith in them. Yup, they’re good, but not a panacea, a remedy for ALL diseases.

Aaron Carroll is not only the host and writer of the series called Healthcare Triage, but he is also a medic and a researchers. Mark his words, because he speaketh truth.

Now, let’g go to aspirin. It can help with blood circulation and, in some cases, it is recommended to eat one pill a day for a while, but this isn’t, also, a panacea. Learn more about aspirin from Dnews:

Because of MSRA, bacteria resistant to medicin, we need to find new ways to kill off bad bacteria. This is where metals like copper and silver and also nanoparticles can help us fend off these bacteria. A good thing to do is to NOT use antibiotics when you do not need them:

Categories
geek learn science tech

Sound tech and facts: how does a music box work, sound dampening, the science of music


The Engineer Guy has posted a new stunning video about the music boxes and how do they work. You HAVE to subscribe to his channel if you want to understand why engineers are a great creative bunch and why we owe them a great deal a respect.

Engineers are the link between scientists and regular people. They transform science into technology. In the video from above you see why a metal comb is a great choice when building a mechanical music box. How these metallic combs generate the sounds is explained by the way each comb teeth is vibrating. Did you know that if you add some weight to a teeth it will vibrate differently?

Music boxes. Awesome stuff.

Now Linus goes into the other direction and teaches us about sound dampening, ways to reduce the noise from around us. In the video from below you will learn about the four ways the sound is dampened: distance, noise cancellation (active anti-noise generators), reflecting/absorbing sound by using shapes and materials (passive noise dampening, also using sound proofing via insulated layers), and via quantum mechanics (creating materials which don’t allow sound to travel through them).

And now to the facts about the science of music from Mental Floss. You will find out about: music being on the same level as sex, enjoyable music will make us spend more, music helps in immune system function, loud music can lead to a better behavior, the brain acts similarly to music even though we have different taste in music.

Categories
geek science tech

3 genius ideas: parking floating signs, water and air drone, tree shaker

parking-floating-sign-here
I have seen the parking floating point first on Facebook (direct link) and it features a simple balloon arrow pointing down with “Here!” on it. When someone gets to the parking place the car goes above the wire the balloon is connected to and the balloon is lowered. Neat.

Meet Naviator, a drone which can fly and which can also go through water. Created by the researchers at Rutgers:

The last one for today is amazing: a tree shaker that can catch the fruits. Looks like alien tech for a bit. It is called a mechanical harvester:

Here is a video of the mechanical harvester in action to go with the photos of the olive harvest posted earlier.

Posted by Owahanga Station on Tuesday, June 2, 2015