Primary colors
The primary colors that the brain (not the retina) perceives are
 yellow
 red
 blue
combining these gives the secondary colors
 orange
 purple
 green
One can see that these secondary colors are intermediate between the primary colors
One would assume then that combining a primary color and a secondary color would result in a color intermediate between the primary and the secondary. And indeed most do. Except for cyan. Cyan is produced by combining blue light and green light but the color we perceive is not intermediate between blue and green.
The color we perceive as cyan is clearly a combination of blue and something. But what that something is is just not clear.
in a bird's cone cells.]]
I suggest that there were originally four primary colors and that cy…
Natural units
 See also: Dimensional analysis and Nondimensionalization
In physics, natural units are physical units of measurement based only on universal physical constants. For example, the elementary charge e is a natural unit of electric charge, and the speed of light c is a natural unit of speed.
 1 Fundamental units
 1.1 Uncertainty principle
 2 References
 3 External links
A set of fundamental dimensions is a minimal set of units such that every physical quantity can be expressed in terms of this set and where no quantity in the set can be expressed in terms of the others.
 https://www.ias.ac.in/article/fulltext/reso/004/02/00200023
 Uncertainty principle
 Gaussian function
 The Spectrum of Riemannium
 wisc.edu
 Stoney Scale and Large Number Coincidences
…
Weather
Earth's weather is primarily driven by rising air in three Lowpressure areas.
 The northern hemisphere polar front.
 Extratropical cyclones form along the front and move eastward at 1215 m/s (4354 km/h) and last 35 days. (36006000 km)
 The Intertropical Convergence Zone. Sometimes, a double ITCZ
forms, with one north and one south of the Equator.
 Tropical cyclones (Hurricanes) form here and move westward.
 The southern hemisphere polar front.
 Extratropical cyclones form along the front and move eastward
And to a lesser extent by descending air in two Highpressure areas:
 Northern hemisphere subtropical ridge (horse latitudes)
 The Sahara desert is here.
 Southern hemisphere subtropical ridge (horse latitudes)
 The Kalahari (in south Africa), the Atacam…
Superconductors and supersolids
Many people wonder how it is possible for a current of electrons to flow forever through a superconductor without any loss. The simplest explanation is that it doesn't. Instead a field is set up inside the superconductor which behaves as though charge was flowing.
The same is true of supersolids except that instead of behaving as though charge was flowing it behaves as though inertial mass was flowing. If we could learn to control this then we could create reaction wheels that have no moving parts.
http://www.open.edu/openlearn/sciencemathstechnology/engineeringandtechnology/engineering/superconductivity/contentsection3.1
Transistors
The triangle in the diode symbol
points in the forward direction, i.e. in the direction of
conventional
current flow. Electrons flow in the opposite direction.
An ntype semiconductor only conducts negatively charged electrons. A ptype semiconductor only conducts positivelycharged holes.
When the diode is forward biased current flows easily and electrons and holes move toward each other and combine at the junction. In the case of a light emitting diode the combining of electrons and holes results in the creation of light.
When the diode is reverse biased current doesn't flow at all. However, in the case of a photodiode current can be induced to flow by shining a light on the junction. When the light is absorbed electrons and holes are created at the…
gravity and gravitation
I'm unclear on whether or not there is a distinction between gravity and gravitation.
Coronal heating problem
Why is the Sun's Corona so much hotter than the Sun's surface?
The coronal heating problem in solar physics relates to the
question of why the temperature of the Sun's corona is millions of
kelvin higher than that of the surface. The high temperatures
require energy to be carried from the solar interior to the corona
by nonthermal processes, because the second law of thermodynamics
prevents heat from flowing directly from the solar photosphere, or
surface, at about 5800 K, to the much hotter corona at about 1 to 3
MK (parts of the corona can even reach 10 MK).
I believe that vibrating atoms in the Sun's core emit Gravitational
Waves. The absorption of this energy corresponds to a Forbidden
Transition therefore these waves pass through the…
Spatial structure of the electron
I am not Victor V. Demjanov.
https://arxiv.org/abs/1002.3880
Experiments performed in order to reveal fundamental differences between the diffraction and interference of waves and electrons
Victor V. Demjanov
(Submitted on 20 Feb 2010)
Diffraction patterns of electrons are believed to resemble those of electromagnetic waves (EMW). I performed a series of experiments invoked to show that the periodicity of peaks in the diffraction diagram of electrons is concerned with the periodicity of the arrangement of scattering centers in the diffraction grating in combination with the supposed character of the spatial structure of the electron as a system of regularly spaced concentric shells of elasticity.I started from the experiment on the diffraction …
Brown dwarfs and degenerate matter
The pressure that an electron orbital can resist without
becoming degenerate = 1/radius^6.
(Except for nondegenerate matter which is 64 times greater)
Therefore the maximum radius that a solid astronomical object can
become before its core collapses depends only on its atomic
mass.
This is why all planets from 1 to 52 jupiter masses are
approximately the same size
Atoms of degenerate matter are four times smaller than non
degenerate matter. Double degenerate atoms are eight times smaller.
Triple degenerate are 16 times smaller.
Image shows 1 diatomic hydrogen molecule next to 2 monatomic helium
atoms
A hydrogen molecule and a helium atom both have a charge of 2 and
are therefore the same size.
Outer electron shell is triple degenerate.
Inner ele…
Hypercomplex numbers
Complex number = a + bi
i^2 = 1
a and b are the coefficients.
Quaternion = hypercomplex = complex number with complex
coefficients = (a+bi)1 + (c+di)j
j^2 = 1
ij = ji = k
Biquaternion = quaternion with complex coefficients.
https://www2.gwu.edu/~spwm/BiquaternionsSPWM.ppt
Quaternions find uses in both theoretical and applied mathematics,
in particular for calculations involving threedimensional
rotations such as in threedimensional computer graphics, computer
vision and crystallographic texture analysis. In practical
applications, they can be used alongside other methods, such as
Euler angles and rotation matrices, or as an alternative to them,
depending on the application.
Quaternions have had a revival since the late 20th century,
primarily…
Algebraic structures
A magma (or groupoid) is a set with a single closed
binary operation (addition).



 a + b = c
 a + b = c


A semigroup is a magma where the addition is
associative.



 a + (b + c) = (a + b) + c
 a + (b + c) = (a + b) + c


A monoid is a semigroup with an additive identity
element.



 a + 0 = a
 a + 0 = a


A group is a monoid with additive inverse
elements.



 a + (a) = 0
 a + (a) = 0


An abelian group is a group where the addition is
commutative.



 a + b = b + a
 a + b = b + a


A pseudoring is an abelian group that has a second closed,
associative, binary operation (multiplication) as
well.



 a * (b * c) = (a * b) * c
 a * (b * c) = (a * b) * c

 And these two operations satisfy a distribution law.

 a(b + c) = ab + ac
 a(b + c) = ab + ac


A ring is a pseudoring that has a multiplicative
identity (see below)



 a * 1 = a
 a * 1 = a


A commutative ring is a ring where multiplication
commutes,



 a * b = b * a
 a * b = b * a


A field is a commutative ring…
Magnetic field in 4 spatial dimensions
Magnetic field in 4 spatial dimensions
In ordinary 3D space the magnetic field forms a ring around a moving charge which is everywhere at right angles to the electric field and the direction of motion of the charge.
But if the charge were moving in the direction of a fourth spatial Dimension then the magnetic field would form a 3D shell completely enclosing the charge. The magnetic field would no longer be a vector field but rather would be a bivector field.
In three dimensions light consists of oscillating electric and
magnetic (vector) fields which are at a right angle to each other
and to the direction of propagation of the light. One dimension is
the electric field. Another dimension is the magnetic field. The
third dimension is the d…
Neutron
Now what would have to be true for an electron to fit inside a Neutron? Lets see.
Angular momentum of electron = (planks constant)/(2pi) Relativistic angular momentum = γmvr Relativistic centripetal force = γmv^2/r
Gamma*(electron mass)c(10^14 m)=(planks constant)/(2pi) solve for gamma Wolfram says gamma = 38.6
38.6*(electron mass)*(velocity of light)^2/(10^14 m) Wolfram says force = 316 newtons
The force between 2 electrons at that distance is ( Coulomb's constant )*(electron charge)^2/(10^14 m)^2 Wolfram says 2.3 newtons
According to those equations the force holding the electron inside the neutron is 137 times stronger than electrostatic repulsion would be at that distance Which means the strong force is 10 billion times stronger tha…
Proper velocity
I never realized how useful proper velocity is. Not only is it useful at both low speed and high speeds but it equals momentum per unit mass at any speed
By grouping γ with v in the expression for relativistic momentum p, proper velocity also extends the Newtonian form of momentum as mass times velocity to high speeds without a need for relativistic mass.
proper acceleration is the rate of change of proper velocity with respect to coordinate time. proper acceleration α and coordinate acceleration a are related through the Lorentz factor γ by α=γ^3a.
Uranium nucleus
There is no strong force. When two protons or proton shells move
toward each other each one puffs up so that the total electrostatic
energy of the overall system decreases. The system therefore
naturally moves toward the state of lowest energy and the 2 proton
shells merge.
The size of each proton shell is quantum mechanically coupled to
the distance between them. There is no classical analogue.
In reality there's a few neutrons involved too. But the general
idea is the same.
The maximum range of the strong force is about 10 fm.
Two protons at rest 10 fm from each other will accelerate away from
each other until each has a kinetic energy of about 72,000 electron
volts.
https://www.wolframalpha.com/input/?i=%28Coulomb%27s+constant*%281+electro…
Gammaray bursts
Short grb = 0.3 sec
Intermediate grb = 1.5 sec
long grb = 30 sec
Radius of largest White Dwarf = 0.13 light seconds
Diameter of neutron = 2 fm
Diameter of tetraneutron = 4 fm
The density of a neutron star = (1.5*10^14 g/cm^3)

 This is the density of close packed tetraneutrons
 This is the density of close packed tetraneutrons
A 1.4 solar mass neutron_star is 11.5 km in radius.
Gravitational binding energy of a neutron star is 0.151 solar mass
which is one tenth of its rest Mass

 (3 * G * (1.4 solar mass)^2/(5 * 11.5 km))/c^2 = 0.151 solar
masses
 Surface gravity = 1.43270128 * 10^11 g's
 Core pressure = 1.212 * 10^28 bar
 (3 * G * (1.4 solar mass)^2/(5 * 11.5 km))/c^2 = 0.151 solar
masses
When the core of the 1.4 solar mass neutron star finally collapses
the energy released by the strong force (not gravity) in the
collapse is converted to passive gravitational_mass but
wit…
Theia
Earth differentiated into gabbro (upper mantle) and peridotite (lower mantle). Earths moon Theia differentiated even further into granodiorite and dunite (olivine).
3 billion years ago Theia's decaying orbit reached the Roche limit and over the next 1 billion years slowly deposited all of its mass onto a ring of mountains circling the earth's equator.
First the ice on its surface was deposited. This formed Earths ocean. Since Earth had no continents at that time the surface of the Earth was completely flooded.
Then the granodiorite was deposited. The granodiorite metamorphosed into the various rocks of the continental crust.
Then 2.4 billion years ago the dunite was deposited. This created the banded iron formations. The dunite sank to the bo…
Lunar recession
There is geological and paleontological evidence that Earth
rotated faster and that the Moon was closer to Earth in the remote
past. Tidal rhythmites are alternating layers of sand and silt laid
down offshore from estuaries having great tidal flows. Daily,
monthly and seasonal cycles can be found in the deposits. This
geological record indicates that 620 million years ago there were
400±7 solar days/year.
The current rate of lunar recession which has been measured very
accurately by mirror's placed on the moon indicates that there
should have been 426 days in a year 620 million years ago. The
usual explanation for the discrepancy is that the moon was receding
more slowly in the past. This makes no sense. If anything the moon
should have b…
Formation of the Solar System
Image below shows four equipotentials of a rapidly spinning 50 Jupiter mass protostar. The north pole is up. The south pole is down. The equator reaches orbital velocity.
Planets form 4 at a time from material spun off the equator. A
pair of large planets and a pair of small planets.
At first all 4 of the planets are in the same orbit but eventually
they end up in orbits that look like this:
Over time the orbits are circularized.
All masses are in units of 10^22 kg
Protosun 9,500,000

 Jupiter 189,800
 Satyrn 56,830
 Neptune 10,240
 Ouranos 8,681
 Jupiter 189,800
Protosun

 Earth 597
 Venus 487
 Mars 64
 Mercury 33
 Earth 597
Jupiter has four large moons too :

 Ganymede 15
 Callisto 10
 Io 9
 Europa 5
 Ganymede 15
Ouranos also has four large moons

 Titania 0.35
 Oberon 0.3
 Ariel 0.135
 Umbriel 0.117
 Titania 0.35
Only two issues:
1) O…
Geology
See also User_blog:Granpa/Theia
Franciscan
(Pressure)
Barrovian
(Heat&Pressure)
Buchan
(Heat)
Metasomatism
Density
Mass
Volume
Radius
Depth
Width
Gravity
(1)Zeolite
(2)PP
(3)Blueschist
(4)Eclogite
(1)Zeolite
(2)Greenschist
(3)Amphibolite
(4)Granulite
(1)Zeolite
(2)AlbiteepidoteHorn
(3)HornblendeHorn
(4)PyroxeneHorn
(5)Sanidinite
1st density is at the surface. 2nd is at depth.
Volume of Moon = 1
Density of liquid iron = 6.3 g/cm3 at 6000 C
Density of solid iron (fcc) = 8.6 g/cm3
Density of Inner core = 8.587 * 27 = 231.85
Rebooting again!
I am once again going to try to reboot this wiki and adopt it. Anyone with me? Dinoenthusiastguy (talk) 16:24, May 30, 2016 (UTC)
Rebuilding wiki
Hi everyone! I don't know if anyone is reading this, but if you are, please reply. This wiki seems to be almost completely abandoned aside from Darkenkaul and myself. If anyone wants to help the wiki please do so, especially if you are an admin. If no admins can be found, I'll try to adopt it. In the mean time, there is lots of work to be done. Help wanted! Dinoenthusiastguy (talk) 04:30, November 24, 2014 (UTC)
Physics Relative Velocity Concept Trouble
I always had trouble with relative velocity problems in two dimensions. Can anyone help me understand the "Man Moving in Rain" relative velocity concept. Also I sometimes get into trouble when I face questions that contain the thing about a man tring to cross a river and all that river flow making him drift right(or left) and then calculating the velocity with respect to ground etc. etc.