For about seven years now my heart will randomly go up in bpm for a while, and then it randomly stops and goes back down to the regular beat. In this time my chest will hurt, and I'll get weak or dizzy, and sometimes even lose sight for a few seconds. The reason I'm recently concerned is because it not only happened again, but for the past couple weeks my chest will randomly hurt, specifically around the left / heart region. What do you think is wrong with me? I'm going to get a blood test and telling the doctor what's wrong with me, but I'd like to... Comment too long. Click here to view the full text.
I've read about quantum nonlocality and a little on Bell's Theorem, but there's something I don't quite understand.
So let's say two entangled particles are created and moved to either side of the universe. The idea is that you look at one and you immediately know the state of the other, and information about the other particle has travelled to you instantaneously.
Couldn't that just mean that the state of a particle contains more information that just that state? E.g. say you measure the state of one of the particles as being spin... Comment too long. Click here to view the full text.
Me and a friend of mine, are working on a presentation about black holes.
We've thought of a few good questions we wanted to answer in our presenattion. Most of them we could answer ourselves, but we're struggeling on anwsering the question: What are the requirements for a star to become a black hole?
From what I've read, it needs to be a star several magnitudes larger than our sun with a massive amount of Iron at its core. This contributes to a point of density and describes an incredibly high pressure core during the super nova that can collapse into a black hole.
Our sin cant do this and in a few billion years, will die a white dwarf.
>>7778769 White dwarfs do become neutron stars, which are stabilised against further collapse by degeneracy pressure. However a white dwarf 3 times heavier than the sun will always collapse into a black hole (cf. Tolman–Oppenheimer–Volkoff limit).
>>7778754 More frequencies which reliably transmit through atmosphere and do not irradiate life.
Given the limits of resolution our amount of wireless bandwidth is basically finite, but our demand seems to be limitless. Thus we need to stop trying to go all wireless and and learn to better use the wireless we do have.
High density short range nodes do offer some promise, but they are still limited by the the same mechanism, not to mention the supporting infrastructure which already consumes a huge amount of resources... Comment too long. Click here to view the full text.
Since a space elevator is out of the question, due to the fact humans suck at making materials strong enough to do it, why not make a space mountain?
Just build a mega mountain that reaches to or past the Karman line. Then people can WALK to space!
Imagine a 100km high man made mega mountain (Mount Everest altitude is only 29km high) Edge and Base Cone Length 115.47km long (based on an equilateral triangle) Volume: 349,000km cubed/83729.5527 miles cubed Weight: 92.4 million megatons (0.0000015% of the weight of the Earth or 184.8 billion 'BelAZ 75710'... Comment too long. Click here to view the full text.
>>7778793 >Material science isn't simply there to build such an object.
It is. You literally just pile shit up in the form of a giant mountain. The real problem is that it will sink. That is, make the entire Earth's crust sink in that spot. The more you pile, the more it sinks. The only way for it to work is to have a completely cold core in the Earth and everything be solid under the crust. You'd always end up with a Mount Everest-sized tip sticking up out of the crust regardless... Comment too long. Click here to view the full text.
1) We can't build anything remotely that high. The square cube law (the same reason an ant can lift many times its own weight and you can't) applies to structures too. Mount Everest is already pretty close to the theoretical limit for how tall a mountain can be without collapsing under its own weight. That's why planets are round in the first place! If you built it out of some exotic material you could get higher, but not THAT high.
2) Even if you could, it wouldn't make space travel easier. Getting to space is about moving fast,... Comment too long. Click here to view the full text.
I'm completely lost after seeing this video https://youtu.be/AAmqeHCFq_8 (starts at 6:50) and reading some more about this topic.
What I understand so far is that energy is NOT stored in chemical bonds (even though most textbooks say it is). But where is the energy stored then and in what form? And how does it work? I'm a biochemistry undergraduate trying to understand this, but I can't get my head around it.
>>7778650 Well that was retarded. Im not entirely sure what he was trying to get, but I think its that the "energy in a chemical bond" is actually potential energy, like when you raise a ball some night off the ground it would be improper to say that the ball has energy or that the ball stores energy.
I've got to say if that is what he's saying then its one of the more autistic gripes I've seen, worse still since he didn't express what he was trying to say that well.
Ss he said. Energy was needed to produce a more complicated structure. Every part of the molceule trys to get to a more stable, ledd energy dense state. Same like cole or oil. Energy has been transfered into it by pressure over long periods of time. If you burn it this energy is released since the molecul gets split into lower molecules and the energy that was used to bond it together is set free.
/Physics/ general Post your field of study and what are you working on? Or How is shit going(e.g. Career wise, family, social life) Homework could be permissible but needs to be up to an intellectual standard.
>>7778723 Why not just also apply for maths. Or take Analysis 1 and Linear Algebra 1 and Experimental Physics 1. Ana 1 and Lina 1 wont be wasted and if you like the physics part more you only continue taking Analysis the next semesters and continue the physics stuff, or you drop the physics stuff and continue math.
Is it anything tangible? For example, "race" is a collection of many genes expressed physiologically that are shared between a large enough population to be classified as a "race". Intelligence, inherent one that is, is a collection of many different genes that allow the capacity to function in different spheres of life. Could consciousness have something like that ascribed to it? Or is there a certain core to it all? Or am I off here on all accounts?
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