# Questions tagged [intuition]

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### Physical interpretation of the semilinear Dirichlet problem

As a non-physicist student, I’ve been trying to gain some intuition on the problem I’m studying, namely \begin{cases} -\Delta u + f(u) = h, \; \text{in } D \subset \mathbb{R}^n\\ u=0, \...
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### How do I know whether waveguides support TE or TM modes?

I'm working through the formalism of waveguides, and I've seen many different situations with various boundary conditions: hollow metal rectangular waveguide, dielectric slab, dielectric rectangular ...
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### Intuition behind torque, rotational inertia and angular momentum

I'm reading about conservation of linear momentum and angular momentum. I understand the idea that angular momentum should be thought of as the "rotational analogue" of linear momentum, just ...
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### Are chaotic systems the same as dissipative systems in inverse time?

Lyapunov exponents define whether a system expands or contracts in phase space and can be used to determine whether a dynamical system is chaotic, conservative, or dissipative. If the volume expands ...
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### How should I understand work?

What is the intuitive meaning of work or analogy used to understand work? I'm able to understand math, but I can't grasp the idea of energy and work. For acceleration, say $+2\frac{\text m}{\text s^2}$...
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### What's the intuitive physical difference between the conservations of momentum and of the boost generator in SR?

This is a soft question about classical special relativity (although a related question applies even to nonrelativistic classical mechanics). The (connected) symmetry group of Minkowski space is the ...
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### Why is torque assumed to be constant?

Consider a spanner: I was doing calculations on how much torque would be applied on the bolt. To do this, I considered how much force was being applied at the full length of the handle. Then, I ...
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### What is an intuitive explanation for the change in internal energy being equal to the heat capacity times the change in temperature?

I read that the change in internal energy, $\Delta U$, is equal to the heat capacity at constant volume, $C_V$, times the change in temperature, $\Delta T$. So, in other words, we have that \$\Delta U =...
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### Intuition About the Impossibility of Acceleration to C in Relativity. Is my Intuition Getting in the Way

Bob is riding a bicycle on a highway into space. His sister Alice watches him leave, and each rotation of the pedals brings Bob an absolute 1% closer to the speed of light relative to Alice. Bob also ...
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### Is there an intuitive way to view the concept of momentum?

Ideas like distance, velocity and force are very intuitive to understand because you can "see" their real-world applications and so one can come to understand them without having any ...
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### Analogy for Lentz soliton

Analogy for Alcubeirre Warp Drive: Every explanation of warp drive in layman terms has this sentence in it: "The Warp Drive will contract space in thier front and expand space behind." (I ...
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### Understanding distance from a line to a point at infinity (Jaan Kalda's handouts)

I'm reading page-7 of Jaan Kalda's Kinematics handouts, the following is written: Here we can use a small addition to the last idea: if the quickest way to a plane (in a 3-d problem) or to a line (in ...
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### Intuitive explaination for the influence of different mass-energy components on the CMB

So I'm going to be giving a talk to a local astronomy club, and I want to be able to give them an intuitive understanding of why the CMB tells us about both the geometry of the universe and the matter ...
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