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Top Questions

36 votes
5 answers
5k views

Why does the pet's water bowl overflow?

30 votes
2 answers
3k views

Error concerning projectile motion in respected textbook?

6 votes
6 answers
3k views

Why is pressure in the outermost layer of a star lower than at its center?

9 votes
4 answers
7k views

Imagining Graham's number in your head collapses your head to a black hole

15 votes
7 answers
2k views

Why does the length of an antenna matter when electromagnetic waves propagate perpendicular to the antenna?

16 votes
5 answers
3k views

How to turn a sum into an integral?

6 votes
7 answers
3k views

How does light beyond the visible spectrum relate to color theory?

5 votes
5 answers
4k views

Wikipedia states that the relativistic Doppler effect is the same whether it is the source or the receiver that is stationary. Can this be explained?

8 votes
5 answers
2k views

Does color temperature limit how much a laser of a given wavelength can heat a target?

22 votes
3 answers
2k views

Can perfectly stable orbits exist in GR?

7 votes
2 answers
3k views

Do thermodynamic cycles occur only in human-made machines?

7 votes
5 answers
2k views

How exactly does a seashell make the humming sound?

15 votes
2 answers
2k views

Eye Floaters Optics

9 votes
2 answers
2k views

Continued calibration of atomic clocks

21 votes
2 answers
2k views

A paradox while explaining the equilibrium of books

12 votes
4 answers
1k views

Relation between energy and time

2 votes
5 answers
473 views

Is a photon truly massless? [duplicate]

7 votes
3 answers
1k views

In equation (3) from lecture 7 in Leonard Susskind’s ‘Classical Mechanics’, should the derivatives be partial?

11 votes
3 answers
2k views

Can a big mass defect make the mass negative?

5 votes
4 answers
803 views

Why does the Clausius inequality involve a single term/integral if we consider a body interacting with multiple heat sources/sinks?

5 votes
6 answers
841 views

How can I interpret the normal modes of this mechanical system?

5 votes
2 answers
1k views

Is there a wavelength shift between sunlight observed from the ISS versus from Earth's surface?

8 votes
5 answers
1k views

Do you always experience the gravitational influence of other mass as you see them in your frame?

3 votes
2 answers
637 views

Areas with anti-parallel gravity in classical physics

2 votes
7 answers
1k views

Do known physical systems all have a unique time evolution?

9 votes
1 answer
937 views

Does the cosmological constant entail a mass for the graviton?

3 votes
4 answers
1k views

How do I know if a motion is 1 dimensional or 2 dimensional?

9 votes
1 answer
1k views

Open or closed windows in a tornado? [closed]

9 votes
3 answers
1k views

Quantum: why linear combination of vectors (superposition) is described as "both at the same time"?

6 votes
3 answers
1k views

Why can't thin clouds form rainbows?

6 votes
3 answers
692 views

Trouble understanding the classic approximation of a black body as a hole on a cavity

4 votes
3 answers
862 views

Is the zero vector necessary to do quantum mechanics?

5 votes
2 answers
1k views

Why can we treat a ball as a point mass to calculate torque?

5 votes
2 answers
842 views

If a unitary operator is close to the identity, will it leave any state it acts on unchanged?

7 votes
4 answers
603 views

Does a rocket moving in a circle expel exhaust at a greater velocity?

4 votes
3 answers
508 views

Why potential energy is not considered in the internal energy of diatomic molecules?

6 votes
2 answers
587 views

Could a transparent frequency-altering material be possible?

3 votes
3 answers
656 views

Where are quantised states in QFT?

3 votes
3 answers
609 views

Path integral at large time

4 votes
3 answers
468 views

Galilean invariance of the wave equation

4 votes
4 answers
346 views

What is the relationship between gravitation, centripetal and centrifugal force on the Earth?

0 votes
3 answers
194 views

Is the size of a black hole singularity smaller than a fundamental particle?

9 votes
4 answers
659 views

Understanding expansion of the Universe as things flying apart

4 votes
2 answers
929 views

What Does Feynman Mean When He Says Amplitude and Probabilities?

3 votes
2 answers
540 views

Does this double well potential contradict the fact that there is no degeneracy for one-dimensional bound states?

3 votes
2 answers
662 views

Is non-temperature related Symmetry Breaking possible?

4 votes
3 answers
850 views

What effects could cause a laser beam inside a pipe to bend?

7 votes
3 answers
400 views

Negative kinetic energy on a step potential


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