The Stack Overflow podcast is back! Listen to an interview with our new CEO.

Questions tagged [laws-of-physics]

DO NOT USE THIS TAG just because the question deals with a law of physics!

Filter by
Sorted by
Tagged with
6
votes
3answers
107 views

Are there any physics formulas with high/large exponents? [on hold]

Most physical laws seem to only have low integer exponents for their variables - in my experience I've never seen a physical law containing variables raised to a power greater than 3 or occasionally 4....
7
votes
1answer
160 views

How do we know the laws of physics remain the same in different dimensions?

Section on Wikipedia dealing with the possibility of different dimensions. When reading this section it feels like there's a giant elephant in the room that is not addressed. For example, here's a ...
-2
votes
3answers
64 views

What is the necessity to universalise a law? [closed]

What are the necessary conditions or observations that are required for universalisation of a law? I am not good at English so by universalise I mean to claim something to be universal. So how can ...
3
votes
2answers
115 views

Are these Stephen Hawking's statements legitimate? [closed]

I am reading 'Brief Answers to the Big Questions' by Stephen Hawking and it seems to me that some of his statements are just hypotheses, but they are written in such a way that they 'sound' like they ...
-1
votes
1answer
27 views

A circuit out of a ring in amper law paradox [closed]

Assuming that there is three line of circuit and our amper ring is surrounded just two circuit . According to amper law the magnitude of B is just related to the circuits in the ring . But here the ...
1
vote
3answers
121 views

Why we don't use Ampere's law to find the magnetic field due to a wire of finite length at its perpendicular bisector?

I know that finite length doesn't have symmetry and thus its hard to apply maths here but take the case of magnetic field of a wire of finite length at a distance r from axis of the wire exactly at ...
1
vote
0answers
21 views

Arranging objects by mass [closed]

I have n objects with different masses . Say mass of n1=m1, n2=m2 .... so on. I want to use concept of centrality in physics to arrange these objects in a field (computer simulation ) . Where object ...
0
votes
1answer
67 views

Are there other theories (apart from string theory) that combined with inflation, would produce universes with different laws?

In chaotic inflation, space would stop expanding in some points, creating hubble volumes that could experience different spontaneous symmetry breaking, which would result in different properties, such ...
1
vote
1answer
37 views

Question reg. reasoning of deterministic reversible cyclical laws - The Theoretical Minimum

I recently started reading "The Theoretical Minimum: What you need to know to start doing Physics". In the first chapter, the authors define the "Minus-First law", and state that reversible ".. laws ...
0
votes
1answer
77 views

Difference between Postulate versus Law

In quantum mechanic, we have many different postulates. In classic mechanic, we have different laws. As long as I know that physics's laws are temporarily correct until an anomaly. But what is the ...
1
vote
0answers
44 views

What physical laws differs in non inertial frame

For me physical laws should be observers independent, what should be depend on the observers are measurements. But one of the postulates of Special relativity is that all laws of physics should be ...
-1
votes
2answers
81 views

Examples of theories that assume the existence of an “External Reality”?

In this paper written by physicist Max Tegmark (https://arxiv.org/pdf/0704.0646.pdf) it talks about "External Reality Hypothesis". Specifically, he says: Although many physicists subscribe to the ...
0
votes
0answers
50 views

Is Universal Law of Gravitation a 'law'? [duplicate]

My textbook mentions that the universal law of gravitation cannot be proved. If so, then why is it called a 'law' and not a 'hypothesis'?
1
vote
2answers
54 views

Does the principle of explosion mean we can prove objects must “fall up” because QM is inconsistent with GR?

(Not sure if this is more appropriate to the Maths.SE) The Principle of Explosion is a law of classical logic which says that if we accept inconsistency, then everything becomes possible. I am ...
-2
votes
1answer
55 views

Would any continuous model of the universe have/be based on hypercomputational laws?

I've read that when Turing-Church thesis is applied to the universe and physics, one of the three interpretations that we can use and is defended by some important physicists is that: "The universe ...
1
vote
3answers
212 views

Is physics the same everywhere in the universe, what if it isn't? [closed]

So, my friend the other day brought up an interesting topic, does physics need to be the same everywhere? He asked, how do we know the universe doesn't, say, simplify itself, far away from us? For ...
16
votes
3answers
2k views

Is the second law of thermodynamics a “no-go” theorem?

As defined here, there are several no-go theorems in theoretical physics. These theorems are statements of impossibility. The second law of thermodynamics may be stated in several ways, some of which ...
2
votes
4answers
161 views

Thermodynamics second law variational statement query

In thermodynamics as I understand entropy is a state function. A state function is a property whose value does not depend on the path taken to reach that specific value. In contrast, functions that ...
3
votes
1answer
49 views

Theories, Corollaries, and Models

I apologize if this question seems overly basic. I was wondering how to recognize what a theory is really saying, as opposed to the explanation/corollaries that are drawn from it. As an example, take ...
1
vote
1answer
86 views

Faraday's Law and the Law of Inertia

Faraday's Law can be stated qualitatively as : Any loop (of wire) opposes/resists the change of magnetic flux through it. The Law of Inertia states that any physical object resists its change in ...
1
vote
2answers
68 views

Issue regarding Newton's second law

Newton's second law says that : The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in which the force acts. Mathematically it says,...
-1
votes
3answers
142 views

What are the most fundamental laws of Newtonian Physics? [closed]

By fundamental, I mean, those laws which if assumed could be used to prove all other laws and provide the essence of the complete picture. I am a high school student, while learning physics I came ...
1
vote
1answer
357 views

If two different theories describe experimental observations equally well, can one be said to be more valid than the other? [closed]

Assuming both use accepted rules of logic, which of the two theories would be accepted and on what basis, for example: simplicity etc.
2
votes
5answers
92 views

Why are the laws of nature consistent? Is it possible for there to be an existence where (eg.) gravity works only some of the time?

Why does the universe always apply the precise forces/events/occurrences in such a way that it wont let you ever catch it in a paradox? What creates the consistency?
-1
votes
1answer
151 views

Why do the laws of physics fail to predict the behavior of frustrators? [closed]

This is my attempt to make an earlier question less broad. This question takes the form of a thought experiment, and is based on this video. Suppose you are given: The positions, velocities, ...
3
votes
4answers
195 views

How are theories selected?

My motivations for asking this question are philosophical but I think this is a question that is best answered by the physics community. There is a problem in the philosophy of science called the '...
0
votes
2answers
82 views

What laws/assumptions are considered fundamental/axiomatic to the widest range of fields of physics?

Inspired by the PBS Space time video on Noether's Theorem released the other day, I got to thinking about what can be considered the most fundamental laws in Physics. They mention in the video that ...
0
votes
1answer
186 views

Can the fundamental laws of Physics be formalized as axioms written in First Order Logic (FOL), or any other logical system for that matter?

Is it possible to state any fundamental law in Physics as an axiom written in First Order Logic (FOL), or any other logical system (and semantic interpretation) for that matter? EDIT: in a way that ...
1
vote
1answer
81 views

Static temperature

A Professor of Fluid Mechanics a told that the static temperature is the temperature observed when the relative speed between observer(thermometer) and fluid is zero. I have trouble understanding as ...
0
votes
2answers
154 views

Do we study the true nature of the universe or reality or just create a model (mathematical) to get approximation close enough to our use? [closed]

Do we study the true nature of the universe or reality or just create a model(mathematical) to get approximation close enough to our use? whether they have to do any thing with reality or not. I have ...
1
vote
0answers
102 views

What physical laws would need to change? [closed]

My fictional worlds reside in a multiverse. More specifically, they reside in a universe within that multiverse that is very similar to ours. But here are some big differences: White holes are in ...
1
vote
1answer
18 views

An electricity experiment [closed]

Ohms law can be sated as V=IR. a. Suppose in an experiment, data is collected of the variation of current with resistance R. Next a plot of R vs I -1 is made. How does one determine the value of V ...
2
votes
1answer
215 views

Are certain fields of physics axiomatized?

Everything from Quantum mechanics can be derived from six (?) postulates. Similarly classical electrodynamics can be reduced to Maxwell's equations and Lorentz force law, and special relativity is ...
-2
votes
1answer
162 views

Difference between a law and a theory [duplicate]

What is the difference between a law and a theory? Some seem to think that a law is a single relationship or a single equation, while a theory is an explanatory framework in which these laws come ...
0
votes
1answer
41 views

Could the equations of physics evolve over time? [duplicate]

Current equations describe everything pretty well but there are some issues considering inflation, quantum gravity, black holes,... How would we be able to verify that these do not evolve over long ...
0
votes
1answer
117 views

Non-negotiable laws in physics [closed]

Are there laws (axioms / principles / equations / inequalities) in physics that cannot be violated, no matter how slightly, by hand without leading to absurdities (singularities, inconsistencies)?
0
votes
3answers
78 views

Need an example of an experiment highlighting Time translation Symmetry

So I have been doing some research on different types of continous symmetries (mainly interested in continuous symmetry since I have been learning abit about Noethers theorem.) and understand the ...
2
votes
3answers
105 views

How Newton's laws replicate themselves on a larger scale?

Now I was reading The Feynman Lectures on Physics and found this which I found somewhat peculiar and deep and thus want your assistance here. So here it goes: The theorem concerning the motion of ...
1
vote
0answers
49 views

Expansion of the universe & laws of physics [duplicate]

Does the expansion of the universe have an effect on the laws of physics, or the constants used in physics? If we were to imagine the universe 40 billion years later, would the same laws still apply?
-2
votes
1answer
54 views

Can the universe operate on a totally different set of laws? [closed]

Recently, I learnt that there are many, many mathematically consistent set of universal laws. How would a universe based on a totally different set of laws look like? What are the mathematical ...
-3
votes
6answers
1k views

Universality of the laws of physics

How is it known at any point in the space of this universe that there is no particle in which its gravitational force does not follow Newton's law or other current laws? How does the same matter ...
-1
votes
1answer
122 views

Why physical laws always have curves for solutions?

Many physical laws are formulated as differential equations. Parabolic equations have parabola as a solution, elliptic equation an ellipse, hyperbolic an hyperbola. All these solutions are curves, ...
-1
votes
1answer
77 views

Do physical laws require 2nd derivatives [duplicate]

Is it a happy coincidence that second degree differential equations approximate reality or a necessity? They describe how a system will evolve from one state to the next, but surely the ultimate laws ...
4
votes
3answers
830 views

Why is conservation of angular momentum considered a law?

We know that angular momentum is defined as the cross product of position and linear momentum. By taking the time derivative, we can deduce that the time rate of change of the angular momentum equals ...
-1
votes
2answers
686 views

What is governing the laws of physics? [closed]

What makes all the laws of physics do what they do? What is the governor of all of those laws?
1
vote
3answers
365 views

Regardless of the multiverse. How are our constants and laws communicated across our universe, and my bathroom?

Assuming the multiverse theory is true, then each universe has a different set of constants and it provides a reasonable explanation as to why the constants in our universe seem set 'just right' for ...
4
votes
4answers
7k views

Why does increasing resistance decrease the heat produced in an electric circuit?

If $H=\frac{V^2}{R}{t}$ ,then increasing resistance means decreasing the heat produced. But, isnt it that the heat in a circuit is produced due to the presence of resistors? Moreover metals with ...
4
votes
4answers
1k views

Justification of Physical Laws [closed]

I'm a maths student, and I've studied quite a lot of mathematical physics. All my courses have a similar style - we state the laws of the system, and then deduce the physical consequences as theorems. ...
-3
votes
3answers
676 views

About time and time dilation [closed]

This question is related to this answer of John Rennie. He says: The length of the red line is the same in both figure 1 and figure 2 I guess his meaning of red line is the space-time distance ...
-11
votes
3answers
1k views

Do we not need a Zeroth Law of motion similar to the Zeroth Law of Thermodynamics? [closed]

Is the Zeroth Law of Thermodynamics necessary? If so, then do we need a similar law for motion?