User Phil Frost

70 votes

Since cables carry electricity moving at the speed of light, why aren't computer networks much faster?

answered Aug 6, 2014 at 12:28

57 votes

Accepted

Why does wavelength affect diffraction?

waves diffraction wavelength

answered Jul 10, 2014 at 18:45

55 votes

Is this really a golden ratio spiral?

fluid-dynamics everyday-life

answered Jul 28, 2014 at 11:42

42 votes

Accepted

Why are these periods the same: a low earth orbit and oscillations through the center of the earth?

newtonian-mechanics newtonian-gravity orbital-motion

answered Jul 11, 2014 at 15:40

35 votes

Accepted

Can a magnetic field exist without an electric field present?

electromagnetism magnetic-fields reference-frames electric-fields

answered Jun 26, 2018 at 15:37

34 votes

Accepted

Is it possible to overload a lightning rod?

electricity lightning

answered Jul 10, 2014 at 20:38

14 votes

Are there any fluids that flow slower in a constricted region, unlike water?

fluid-dynamics conservation-laws flow

answered Jul 24, 2018 at 15:02

8 votes

If visible light has more energy than microwaves, why isn't visible light dangerous?

energy visible-light electromagnetic-radiation estimation microwaves

answered Jan 7, 2019 at 20:16

8 votes

Accepted

When a planet has a high gravity, is it impossible to build and launch a successful chemical rocket to space?

newtonian-gravity rocket-science

answered Jul 11, 2014 at 16:58

7 votes

Batteries in series vs parallel

electricity electric-circuits electric-current voltage batteries

answered Jan 2, 2017 at 17:05

7 votes

Why does a swimmer cross a swimming pool in the same time as crossing a flowing river?

newtonian-mechanics kinematics velocity

answered Sep 13, 2021 at 19:52

5 votes

Why does fire make very little sound?

thermodynamics waves acoustics everyday-life

answered Sep 7, 2018 at 2:05

5 votes

Accepted

How does the speed of electrons change around a circuit?

electromagnetism condensed-matter electrons electric-current speed

answered Jul 11, 2014 at 17:19

5 votes

Why don't two musical instruments sometimes generate destructive interference?

waves acoustics interference

answered Jun 2, 2014 at 17:11

4 votes

Accepted

Maximum speed higher than the speed of light

special-relativity speed-of-light faster-than-light

answered Aug 9, 2014 at 11:30

4 votes

How does Ohm's law apply to superconductors?

electric-circuits electrical-resistance superconductivity power electronics

answered Aug 18, 2014 at 13:30

3 votes

Why is capacitance defined as charge divided by voltage?

electrostatics electricity electric-circuits charge capacitance

answered Apr 28, 2016 at 19:29

3 votes

Speed of electrons in a current-carrying metallic wire: does it even make sense?

electrons solid-state-physics electric-current conductors speed

answered Feb 23, 2018 at 17:04

3 votes

If centrifugal force isn't real then why am I being pushed on a merry go rournd?

newtonian-mechanics forces reference-frames inertial-frames centrifugal-force

answered Jun 26, 2018 at 13:10

3 votes

Accepted

How are electromagnetic waves differentiated?

electromagnetism electric-circuits radio

answered Aug 6, 2014 at 21:07

3 votes

Light has a wave particle duality, how do we know?

visible-light wave-particle-duality

answered Aug 7, 2014 at 19:33

2 votes

Can friction be brought in to zero value by means of laboratory experiments?

newtonian-mechanics friction

answered Jul 21, 2014 at 11:28

1 vote

Why Light and Observers have different laws of physics

special-relativity speed-of-light spacetime observers laws-of-physics

answered Jul 21, 2014 at 19:29

1 vote

Acceleration in $F=ma$

newtonian-mechanics forces mass acceleration

answered Jul 13, 2014 at 1:01

1 vote

Surface charge in a wire?

electromagnetism electricity electrostatics electric-circuits

answered Feb 11, 2014 at 20:17

1 vote

The workings of the Hall effect?

electromagnetism electricity electrons classical-electrodynamics

answered Feb 12, 2014 at 16:24

1 vote

Accepted

Is periscope window mathematically possible?

optics

answered Jun 27, 2018 at 17:08

1 vote

Accepted

Effects of Relativity on an Object in Circular Motion

electromagnetism general-relativity special-relativity relativity

answered Jun 30, 2018 at 2:58

1 vote

Birds on a wire (again) - how is it that birds feel no current? They are just making a parallel circuit, no?

electric-circuits electric-current voltage

answered Mar 29, 2020 at 20:14

1 vote

Is the energy of a $1$ Volt $300$ MHz EM wave greater than a low frequency $200$ V EM wave?

electromagnetism special-relativity electromagnetic-radiation electrons

answered Jul 25, 2018 at 18:47

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40 Answers

Since cables carry electricity moving at the speed of light, why aren't computer networks much faster?

Why does wavelength affect diffraction?

Is this really a golden ratio spiral?

Why are these periods the same: a low earth orbit and oscillations through the center of the earth?

Can a magnetic field exist without an electric field present?

Is it possible to overload a lightning rod?

Are there any fluids that flow slower in a constricted region, unlike water?

If visible light has more energy than microwaves, why isn't visible light dangerous?

When a planet has a high gravity, is it impossible to build and launch a successful chemical rocket to space?

Batteries in series vs parallel

Why does a swimmer cross a swimming pool in the same time as crossing a flowing river?

Why does fire make very little sound?

How does the speed of electrons change around a circuit?

Why don't two musical instruments sometimes generate destructive interference?

Maximum speed higher than the speed of light

How does Ohm's law apply to superconductors?

Why is capacitance defined as charge divided by voltage?

Speed of electrons in a current-carrying metallic wire: does it even make sense?

If centrifugal force isn't real then why am I being pushed on a merry go rournd?

How are electromagnetic waves differentiated?

Light has a wave particle duality, how do we know?

Can friction be brought in to zero value by means of laboratory experiments?

Why Light and Observers have different laws of physics

Acceleration in $F=ma$

Surface charge in a wire?

The workings of the Hall effect?

Is periscope window mathematically possible?

Effects of Relativity on an Object in Circular Motion

Birds on a wire (again) - how is it that birds feel no current? They are just making a parallel circuit, no?

Is the energy of a $1$ Volt $300$ MHz EM wave greater than a low frequency $200$ V EM wave?