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hft's user avatar
hft
  • Member for 7 years, 8 months
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33 votes

What shape the Earth would have to be for an object in free fall to follow a straight line trajectory?

25 votes
Accepted

Zero velocity, zero acceleration?

13 votes

Apart from the sine wave, are there any other waveshapes that could be thought of as commonly appearing "in nature"?

12 votes

What makes energy "the" conserved quantity associated with temporal translation symmetry?

12 votes

What if the resulted error is so large?

11 votes

Does special relativity imply that I can reach a star 100 light years away in less than 100 years?

10 votes

Bar magnet dropped through coil

9 votes

Cross products/avoiding using your hand for the right hand rule in E and M

9 votes

Binomial expansion of non-commutative operators

9 votes

Are matter waves (de Broglie) classified as transverse or longitudinal?

9 votes

Basics of photoelectric effect

8 votes
Accepted

A particular solution for the wave equation in 1+1D

8 votes
Accepted

Why does a stream of falling water get narrower at the bottom?

7 votes

What causes the electric field of a uniformly moving charge to update?

7 votes

Trying to understand Newton's Second Law

7 votes
Accepted

Integration of Laplacian by parts

7 votes

Deriving cross product from angular momentum algebra

7 votes
Accepted

How is $ \frac{dv}{ dt} = a $?

7 votes

Units inside a logarithm

6 votes

Is electromagnetic vector field a sum of E and B?

6 votes
Accepted

Dual of the TDSE

6 votes
Accepted

Is this symmetry factor in Peskin wrong?

6 votes

Where does the majority of the mass of the usual matter come from?

6 votes
Accepted

How to prove that sum converges to integral using density of states?

6 votes

Does a volume stay constant when freely falling?

5 votes

Would it be possible to ride a bicycle on the surface of Mars?

5 votes

What's wrong with this "proof" that all Hamiltonians are time independent?

5 votes
Accepted

Conservation of momentum in electromagnetics

5 votes
Accepted

What is the Meaning of the equation $\frac{d\sigma}{d\Omega}=\left|f(\theta,\phi)\right|^2$

5 votes
Accepted

Quantization of a free field: Klein-Gordon case

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