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Questions tagged [physics]

Physics is the natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.

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Is the conventionalism re: the terms "electron" and "positron" an article of evidence for the inversion account of negation?

From the SEP article on negation: In Hintikka’s (1973) game-theoretical semantics, negation is modeled by a role-switch between two players in a semantic game (cf. the entry on logic and games). A ...
Kristian Berry's user avatar
3 votes
5 answers
654 views

Model and implication of bidirectional time

I have thought about it and currently it is mostly considered to be an absolute fact that time is uni dimensional and only goes one way, or naturally only go one way, or forward, but if time weren't ...
Sayaman's user avatar
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How do physicists talk about spin of individual particles when the universe is massively entangled?

The following two things seem to be true: (1) The universe is massively entangled because the wave function that describes the entire universe has measure 1 of being entangled. Further, given how ...
zzz's user avatar
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1 answer
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How does mathematical atomism do away with the classical conception of man?

I've been reading E.A. Burtt, The Metaphysical Foundations of Modern Science. I keep going back to Galileo and his idea of motion, space, and time. I still can't internalize what he means by man ...
ashadow4u's user avatar
4 votes
5 answers
777 views

Is David Deutsch correct in stating that the Copenhagen interpretation of QM has few defenders left? [closed]

In his site here, he says Confusion, obfuscation or inconsistency, including non-dynamical ‘wave function collapse’ theories, the ‘Copenhagen interpretation’ (which is in some sense still the ...
Baby_philosopher's user avatar
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1 answer
61 views

Why things don't happen all at once?

Why was there a time between Big Bang and now? Why it did not happen all at once? Why is there a delay between two changes? Why delay (time) exists? Why are not all changes compressed into extremely ...
Alexa's user avatar
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6 votes
7 answers
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Is something physical if and only if we can perceive it (directly or indirectly) with our bodily senses?

What is the relationship between the physical and our senses? If something is physical, must it necessarily be the case that we should be able to perceive it, at least in principle, directly with our ...
Mark's user avatar
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3 answers
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What is the motive of the universe? [closed]

If you look at the options, the universe is either temporally bounded temporally unbounded is either bounded spatially or unbounded spatially and is any of these permutations with our uncertainty. ...
8Mad0Manc8's user avatar
2 votes
2 answers
92 views

Does space behave like a logical operator that applies rules to its elements?

I am asking due to being inspired by the following: Consider a particle system with uniform motion in vacuum not sensitive towards fluctuations, such that classical mechanics applies. Now, consider ...
Wowser's user avatar
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2 answers
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What aspects of the physical and metaphysical aspects of human existence limit humans from perceiving all of reality? [closed]

It might be a naive question, but just like light, which in a way has a ‘cosmic trait’ of the constant speed of 299,792,458 m/s, due to which light cannot perceive time; so similarly is it possible ...
liftoff's user avatar
2 votes
5 answers
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What is wrong with the following case against determinism?

I am thinking of determinism in the following way: if we knew all the laws of nature and the complete state of the universe at a given time, we could predict everything that would happen in the future....
user52932's user avatar
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Does the universal "step-by-step" property of knowledge eg in The Meno conflict with the fluctuation theorem from statistical mechanics

Background: There seems to be a universal property of knowledge, which is captured under Plato's reminiscence theory (remembrance), that acquiring knowledge necessary involves a series of steps that ...
J Kusin's user avatar
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Can several logic systems coexist physically in the same world?

In mathematics, each logic system is associated with an abstract model. In physics, similarly, each logic system is associated with a physical model that models a part of the universe, but I don't ...
Sayaman's user avatar
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Consciousness and Understanding of Physics, Mathematics and Philosophy

I just finished watching a youtube video Bernard Carr - Why Did Consciousness Emerge? on consciousness and the talkers spend a great deal of time talking about emergent aspect of consciousness and its ...
Alexander's user avatar
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How Can Computation Cause Consciousness?

The question of how consciousness arises and what, if any, effect it has on our behaviour is clearly both fascinating intellectually and of great practical and ethical significance. One very common ...
MBar2269's user avatar
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Is there a need for a new field of natural-practical philosophy?

Natural philosophy is now generally known as physics. Some ancient universities still call it natural philosophy. But all of science could be included under the term, natural philosophy. There is also ...
Meanach's user avatar
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Is there a reason for why the wave function for a particle is the way it is?

I have read that in quantum mechanics, predicting the position of an electron, say in the double slit experiment is impossible. It is thus then implied that there is no reason for the electron to end ...
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3 votes
2 answers
156 views

Question about Boltzmann Brain?

If all the memories contained within a Boltzmann brain were hypothetical, so would be the physical laws that enable its very existence; therefore, a Boltzmann brain wouldn't be able to explain itself?
Marco Fabbri's user avatar
2 votes
4 answers
176 views

Did Bell rule out all possible kinds of local determinism in the world?

From what I can understand, Bell proved that a certain particle is expected to behave a certain way if there is a hidden variable that determines its eventual state beforehand. Because this doesn’t ...
user avatar
0 votes
3 answers
154 views

Physics and the question of context or environment

This is a reality check type of question. I am interested in whether it's a valid distinction and whether it's been considered by others. It occured to me the other day that the issue of 'context' or '...
Wayfarer's user avatar
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Does modern physics say that everything is technically possible?

Does modern physics state that air molecules can randomly whizz around in such a way to cause a voice emanating from the clouds that is clear and coherent? Is this possible or not? Is this extremely ...
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2 votes
5 answers
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Can there be certain events that would still be predictable under indeterminism?

Let’s take the example of a bird landing on a tree branch. Suppose now that one knew everything there is about the universe billions of years before the bird landed, like Laplace’s demon. Given this, ...
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1 vote
1 answer
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Understanding Aristotle's argument of simultaneously and sequentially actualisable potential infinities in response to Atomism

I am reading a book about Aristotle. Aristotle lays out a potential argument against infinite divisibility by the Atomists, that infinite division would leave components of zero-magnitude which could ...
tom894's user avatar
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6 answers
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Order/disorder and complexity

What is the relation between order/disorder and complexity ? Sometimes I found the terms confusing and ambiguous. And higher entropy implies low complexity, does not implies low entropy implies higher ...
quanity's user avatar
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5 votes
2 answers
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Causation in physics

Electromagnetic radiation phenomena exhibit a temporal asymmetry: we observe radiation coherently diverging from a radiating source, such the light emitted by a star, but we do not observe radiation ...
quanity's user avatar
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6 answers
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Is much of theoretical physics nothing more than speculative assumptions?

Religion, spirituality, and other “pseudoscientific” theories are constantly seen as backwards and lacking of evidence. But if a lack of evidence before believing in something is considered irrational,...
user avatar
1 vote
0 answers
47 views

Reviewing Loschmidt’s paradox in the quantum case?

Boltzmann formulated the Stosszahlansatz : Stosszahlansatz is the assumption that the velocities of colliding particles are uncorrelated, and independent of position. This means the probability that ...
More Anonymous's user avatar
1 vote
1 answer
103 views

Neither Presentism nor Eternalism by Carlo Rovelli

The paper in question Rovelli argues against both presentism and eternalism. Later he proposes third option in which the concept of "local present" is central. The problem is I cannot ...
ArAj's user avatar
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5 answers
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Are there examples in the literature of rigorous mathematical models of libertarian free will that take the laws of physics into account?

What I'm looking for is a detailed description of the decision-making process of an agent that possesses libertarian free will, when this agent is on the verge of making a choice, at some time t. For ...
Mark's user avatar
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5 votes
2 answers
112 views

What is character, and what role does it play in the decision making of an agent, according to proponents of libertarian free will?

I understand libertarian free will as an agent's ability to choose otherwise, or having more than one course of action available to them, when making a choice at time t, given a fixed past up to t. ...
Mark's user avatar
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3 answers
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Can non physical causes that lead to physical effects be imagined? How does this impact its logical possibility?

Logically impossible concepts mean that they contain a contradiction. For example, a square triangle contains a contradiction. However, logically impossible concepts are also often concepts you cannot ...
user avatar
6 votes
8 answers
2k views

Is all change movement?

Is there a change in the universe that cannot be reduced to movement? One counter-example should be enough. :) Heat is a type of change that was once thought to be qualitative, but is now realized to ...
Olle Härstedt's user avatar
4 votes
4 answers
397 views

What would happen if the universe had no global symmetries and conservation laws?

I am asking this question in this site as it involves some philosophy of physics... I am trying to understand what would happen to the universe if it had no global symmetries (including those that ...
vengaq's user avatar
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0 votes
2 answers
286 views

Is special relativity immune to the paradox of Achilles?

According to the entry "Proper Time" in Wikipedia, for an object in a SR spacetime traveling with velocity v for a time interval Δ T c2Δ T 2 = c2 Δτ2 + v 2 Δ T2, where Δ T is the coordinate ...
Morteza's user avatar
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2 votes
5 answers
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Special Relativity - Discussions I've seen online

I've seen some odd discussions on this forum that have stuck with me. But I've seen there are some very clever physicists and philosophers on here who actually understand relativity... In relativity ...
Simon01_Pringles's user avatar
1 vote
3 answers
112 views

Are there concepts of laws-of-physics where the laws have a "fail rate"?

The closest to this idea I could find was talk of ceteris paribus laws, but it was hard to tell how much this concerned physics, even just potentially/speculatively. But having decided to believe that ...
Kristian Berry's user avatar
0 votes
0 answers
84 views

Special Relativity philosophical implications

If an observer on Andromeda moves forwards and backwards their notion of now here on Earth sways back and forth over hundreds of years Why don't we constantly oscillate over hundreda of years whenever ...
Danny55's user avatar
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2 votes
4 answers
1k views

How meaningful is the notion of now here on Earth?

Special relativity and the lack of a now moment is causing me a bit of grief. How meaningful is the notion of now here on Earth between each of us? Does the lack of an objective now moment in any way ...
Danny55's user avatar
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5 votes
4 answers
1k views

Can the continuum hypothesis be settled in physics?

Can the continuum hypothesis be settled in physics? In a lecture mathematician Woodin considers the possibility: Develops the mathematical physics of a mathematical understanding of the physical ...
More Anonymous's user avatar
3 votes
6 answers
222 views

Is the design answer to fine-tuning sufficiently complete?

If the problem of "fine tuning for life" (SEP) is that the precise value of some constants (and laws) in physics seems necessary to the emergence of life in our universe but at the same time ...
Frank's user avatar
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0 votes
2 answers
115 views

Describing the universe using symbols?

Now, for someone who wants to describe the universe using symbols. Let's say I describe some phenomena up-to some approximation. I use some symbols to do this. For example consider the ideal gas ...
More Anonymous's user avatar
3 votes
2 answers
297 views

How does Hegel account for the laws of physics?

This is related to: How do non-theist idealists account for laws of physics? But I'm narrowing down this question specifically to Hegel. If reality is Geist (which is something like mind/spirit), and ...
Ameet Sharma's user avatar
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-1 votes
2 answers
106 views

Dimensional constants, evolution and the anthropic principle?

If I think of a process like say evolution. I can in some sense map the process of evolution to an algorithm. But my point is that evolution in some sense yes is modelled by this but this missed out ...
More Anonymous's user avatar
-2 votes
1 answer
116 views

The symbol grounding problem, physicalism and 2nd law of thermodynamics?

How does a physicalist resolve this dilemma (and what is it known as)? Consider a physicalist who wants to solve the symbol grounding problem. He postulates that a particular brain configuration ...
More Anonymous's user avatar
0 votes
4 answers
131 views

Do preceding events cause subsequent ones in a four-dimensionalist world?

I feel like this question has a good chance of having been asked here before, but the first ten-odd "similar questions" listed by the site when I composed the title didn't cover what I'm ...
Kristian Berry's user avatar
3 votes
2 answers
1k views

Philosophical implications of entangled states (and the 2022 physics nobel prize)

FYI: For the 2022 Physics Noble Prize announcement, see here. First, I realize the subjective nature of any potential answers or discussions regarding this question. In spite of that, I'm still ...
nate's user avatar
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4 votes
5 answers
1k views

How does entropy explain consciousness and the forward direction of time?

How does entropy explain consciousness and the forward direction of time? I was told that entropy is the increasing of disorderliness and that consciousness cannot exist as memory increases when ...
Sayaman's user avatar
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1 vote
1 answer
87 views

What are the relational and absolute quantities in classical mechanics?

So it seems to a lot classical mechanics involves identifying fundamental quantities (like velocity) but the meaningful questions are absolute quantities like relative velocity. I've been trying to ...
More Anonymous's user avatar
0 votes
2 answers
139 views

Is human thought itself a fundamental force?

To begin with, as far as I understand, there are four well accepted forces of nature: Gravity Weak interaction Strong interaction Electromagnetism Now, these forces are all characterized by changing ...
tryst with freedom's user avatar
3 votes
3 answers
446 views

The Principle of Least Action as a Theory of Everything?

Theoretical physicist Sabine Hossenfelder views the Principle of Least Action as " the closest thing we have to a theory of everything." It works in classical physics as well as in quantum ...
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