User gen-ℤ ready to perish

11 votes

2 answers

2k views

Kinematic equation as infinite sum

asked Sep 4, 2016 at 21:59

6 votes

4 answers

1k views

Why are electrical units (specifically, electrical current) considered a base unit?

electric-current charge units si-units metrology

asked May 13, 2017 at 4:04

4 votes

0 answers

190 views

Consistent nomenclature for $\mathbf{E}$-, $\mathbf{D}$-, $\mathbf{B}$-, $\mathbf{H}$-, $\mathbf{P}$-, and $\mathbf{M}$-fields [closed]

electromagnetism magnetic-fields electric-fields terminology conventions

asked Jun 26, 2017 at 1:28

2 votes

1 answer

4k views

Two different meanings of $\nabla$ with subscript?

notation differentiation vector-fields calculus

asked Jul 7, 2017 at 3:15

2 votes

1 answer

170 views

What assumptions would I have to make to rigorously prove power equals force dotted with velocity, $P=\mathbf{F}\cdot\mathbf{v}$?

newtonian-mechanics forces work velocity power

asked Oct 20, 2017 at 12:48

2 votes

1 answer

540 views

How does one describe how a basis vector changes through space using the Christoffel symbols?

general-relativity special-relativity vectors relativity tensor-calculus

asked Dec 24, 2017 at 21:53

2 votes

1 answer

174 views

Why do we need to define both luminous intensity and illuminance?

visible-light electromagnetic-radiation radiometry photometry

asked Apr 9, 2018 at 0:16

1 vote

1 answer

295 views

How is the subjective loudness of sound computed?

acoustics perception

asked Jun 14, 2018 at 5:10

1 vote

2 answers

163 views

Would Faraday’s law still hold?

electromagnetism

asked May 7, 2017 at 3:59

1 vote

1 answer

71 views

How does one categorize antiparticles in flavor, family and generation?

terminology standard-model antimatter leptons

asked Mar 3, 2018 at 4:58

1 vote

1 answer

180 views

Is the matrix Lorentz transform equivalent to statements of time dilation, length contraction and effective mass?

special-relativity time-dilation

asked Dec 16, 2017 at 3:55

1 vote

2 answers

128 views

Why is the formula written this way?

electromagnetism notation

asked Apr 16, 2017 at 22:46

0 votes

1 answer

82 views

Electric field per permittivity

electromagnetism magnetic-fields electric-fields

asked May 5, 2017 at 20:52

0 votes

2 answers

4k views

Deriving $-dU/dr$

forces work potential-energy calculus

asked Oct 12, 2016 at 5:11

0 votes

2 answers

2k views

Mathematical relationship between escape speed and orbital speed

homework-and-exercises newtonian-mechanics newtonian-gravity orbital-motion escape-velocity

asked Jan 23, 2017 at 22:31

0 votes

3 answers

325 views

Base unit definition and realization under relativistic conditions

relativity si-units metrology

asked May 23, 2017 at 19:26

0 votes

1 answer

76 views

Can this textbook question on angular magnification be answered without a ruler?

optics imaging

asked Mar 13, 2020 at 2:05

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17 Questions

Kinematic equation as infinite sum

Why are electrical units (specifically, electrical current) considered a base unit?

Consistent nomenclature for $\mathbf{E}$-, $\mathbf{D}$-, $\mathbf{B}$-, $\mathbf{H}$-, $\mathbf{P}$-, and $\mathbf{M}$-fields [closed]

Two different meanings of $\nabla$ with subscript?

What assumptions would I have to make to rigorously prove power equals force dotted with velocity, $P=\mathbf{F}\cdot\mathbf{v}$?

How does one describe how a basis vector changes through space using the Christoffel symbols?

Why do we need to define both luminous intensity and illuminance?

How is the subjective loudness of sound computed?

Would Faraday’s law still hold?

How does one categorize antiparticles in flavor, family and generation?

Is the matrix Lorentz transform equivalent to statements of time dilation, length contraction and effective mass?

Why is the formula written this way?

Electric field per permittivity

Deriving $-dU/dr$

Mathematical relationship between escape speed and orbital speed

Base unit definition and realization under relativistic conditions

Can this textbook question on angular magnification be answered without a ruler?