Bride သတိုးသမီး wanted for ko lu aye. dear min lu aye chan, ur grandmother starts to look for a bride for u. Arakan tradition is that when a boy passes BEHS exam. ,parents look forward to engage with a charming girl....

Hla Myint with ကိုေဇာ္ ေမျမဳိ့ and 8 others.

Bride သတိုးသမီး wanted for ko lu aye.
dear min lu aye chan,
ur grandmother starts to look for a bride for u.
Arakan tradition is that when a boy passes BEHS exam. ,parents look forward to engage with a charming girl....
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ကိုေဇာ္ ေမျမဳိ့ with Shwe Zin and 15 others.

Yesterday at 6:12am ·

မမ - ၁၉၁၈ ေမာင္မင္းလူေအးခ်မ္း
ဘာပဲျဖစ္ျဖစ္ အေဖ ေက်နပ္ပါတယ္ ငါ့သား ကိုလူေအး ......

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26 You, San Win Thaung, မမခ်စ္တဲ ကြၽန္ေတာ္ and 23 others

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Hla Myint dear min lu aye chan,
ur grandmother starts to look for a bride for u.
Arakan tradition is that when a boy passes BEHS exam. ,parents look forward to engage with a charming girl....See More

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Hla Myint ko lu aye wants to attend " music school".
ko lu aye's great grand father u ba than ( pen nam/ mg naung ta ေမာင္ေနာင္တ) left Rangoon University @ BA last year.
The old man left University because he was bitten by love bug အခ်စ္ပိုး အကိုက္ခံရလို႕ RU ေက...See More

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27 june 2017.A Carnot heat engine[2] is an engine that operates on the reversible Carnot cycle.

27 june 2017.
https://en.wikipedia.org/wiki/Carnot_heat_engine#Carnot.27s_theorem
A Carnot heat engine^[2] is an engine that operates on the reversible Carnot cycle. The basic model for this engine was developed by Nicolas Léonard Sadi Carnot in 1824. The Carnot engine model was graphically expanded upon by Benoît Paul Émile Clapeyron in 1834 and mathematically elaborated upon by Rudolf Clausius in 1857 from which the concept of entropy emerged.
Every thermodynamic system exists in a particular state. A thermodynamic cycle occurs when a system is taken through a series of different states, and finally returned to its initial state. In the process of going through this cycle, the system may perform work on its surroundings, thereby acting as a heat engine.
A heat engine acts by transferring energy from a warm region to a cool region of space and, in the process, converting some of that energy to mechanical work. The cycle may also be reversed. The system may be worked upon by an external force, and in the process, it can transfer thermal energy from a cooler system to a warmer one, thereby acting as a refrigerator or heat pump rather than a heat engine.

Contents

• 1 Carnot's diagram
• 2 Modern diagram
• 3 Carnot cycle
• 4 Carnot's theorem
• 5 Efficiency of real heat engines
• 6 Notes
• 7 References
  
  
  
  Learning Basics of thermodynamics.
  27 june 2017,
  Carnot engine diagram (modern) - where an amount of heat QH flows from a high temperature TH furnace through the fluid of the "working body" (working substance) and the remaining heat QC flows into the cold sink TC, thus forcing the working substance to do mechanical work W on the surroundings, via cycles of contractions and expansions.
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A gravitational singularity or space-time singularity is a location in space-time where the gravitational field of a celestial body becomes infinite

27 june 2017.
https://en.wikipedia.org/wiki/Gravitational_singularity

A gravitational singularity or space-time singularity is a location in space-time where the gravitational field of a celestial body becomes infinite in a way that does not depend on the coordinate system. The quantities used to measure gravitational field strength are the scalar invariant curvatures of space-time, which includes a measure of the density of matter. Since such quantities become infinite within the singularity, the laws of normal space-time cannot exist.^[1][2]
A gravitational singularity as predicted by general relativity is at the center of a black hole: any star collapsing beyond a certain point (the Schwarzschild radius) would form a black hole, inside which a singularity (covered by an event horizon) would be formed.^[3] The Penrose–Hawking singularity theorems define a singularity to have geodesics that cannot be extended in a smooth manner.^[4] The termination of such a geodesic is considered to be the singularity.
According to modern general relativity, the initial state of the universe, at the beginning of the Big Bang, was a singularity.^[5] Both general relativity and quantum mechanics break down in describing the earliest moments of the Big Bang,^[6] but in general, quantum mechanics does not permit particles to inhabit a space smaller than their wavelengths.^[7]

Contents

• 1 Interpretation
• 2 Types
  • 2.1 Conical
  • 2.2 Curvature
  • 2.3 Naked singularity
• 3 Entropy
• 4 See also
• 5 Notes
• 6 References
• 7 Further reading

What is the response of inductor and capacitor for ac and dc voltages? Balajee Seshadri Balajee Seshadri, Electrical Engineer working in Electronics Field Answered Nov 16, 2015 Let us try to understand the Inductor and Capacitor in a different method than the regular method. Both Inductor and Capacitor are variable resistor like Rheostat. In Rheostat the Resistance manually changed. In Capacitor and Inductor, the resistance is varied using frequency of the signal. Fixed Resistor - The Value between A & B is fixed. Variable Resistor - The Value between A & C can be changed. When the position of C reaches the position of A the resistance between A & C becomes 0. When the position of C reaches the position of B the resistance becomes Maximum. Generally we know that in rheostat we change the position of C manually. But in capacitor and Inductor the position of C is controlled by the frequency. In Capacitor the resistance (Reactance) is equal to 1/2πfC. In Capacitor the R is mentioned as Xc. When value of f is 0 (DC) the resistance is ∞. When the value f reaches high value (i.e. High frequency AC signal) the value of resistance reaches 0. In Indusctance the resistance (Reactance) is equal to 2πfL. In Inductor the R is mentio

25 june 2017.

What is the response of inductor and capacitor for ac and dc voltages?

Balajee Seshadri, Electrical Engineer working in Electronics Field

Answered Nov 16, 2015

Let us try to understand the Inductor and Capacitor in a different method than the regular method.

                   Both Inductor and Capacitor are variable resistor like Rheostat.

                   In Rheostat the Resistance manually changed.

                   In Capacitor and Inductor, the resistance is varied using frequency of the
                    signal.

                   Fixed Resistor - The Value between A & B is fixed.

                                           

                 Variable Resistor - The Value between A & C can be changed.

                  When the position of C reaches the position of A the resistance between A & C becomes 0. When the position of C reaches the position of B the resistance becomes Maximum.  Generally we know that in rheostat we change the position of C manually. But in capacitor and Inductor the position of C is controlled by the frequency.

                  In Capacitor the resistance (Reactance) is equal to 1/2πfC.  In Capacitor the R is mentioned as Xc.

        When value of f is 0 (DC) the resistance is ∞. When the value f reaches high value (i.e. High frequency AC signal) the value of resistance reaches 0.

         In Indusctance the resistance (Reactance) is equal to 2πfL.  In Inductor the R is mentioned as XL.

        When value of f is 0 (DC) the resistance is 0. When the value f reaches high value (i.e. High frequency AC signal) the value of resistance reaches high value.

This same method can be used for Transistor, Themistor, etc.

         I did not go deep into Capacitor and Resistor. I tried explain in top level. If you need any more details write a comment. We can discuss more.

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25 june 2017. Food for thought in physics. See also: Non-inertial frame, Rotating spheres, and Bucket argument.

25 june 2017.
Food for thought in physics.

See also: Non-inertial frame, Rotating spheres, and Bucket argument

Figure 2: Two spheres tied with a string and rotating at an angular rate ω. Because of the rotation, the string tying the spheres together is under tension.

Figure 3: Exploded view of rotating spheres in an inertial frame of reference showing the centripetal forces on the spheres provided by the tension in the tying string.

Figure 1: Two frames of reference moving with relative velocity ${\displaystyle {\stackrel {\vec {v}}{}}}$. Frame S' has an arbitrary but fixed rotation with respect to frame S. They are both inertial frames provided a body not subject to forces appears to move in a straight line. If that motion is seen in one frame, it will also appear that way in the other.

24 june 2017. Learning Basics physics. De Broglie's wavelength.

24 june 2017.
Learning Basics physics.

De Broglie's wavelengthEdit

Main article: Matter wave

Propagation of de Broglie waves in 1d—real part of the complex amplitude is blue, imaginary part is green. The probability (shown as the colour opacity) of finding the particle at a given point x is spread out like a waveform; there is no definite position of the particle. As the amplitude increases above zero the curvature decreases, so the amplitude decreases again, and vice versa—the result is an alternating amplitude: a wave. Top: Plane wave. Bottom: Wave packet.

In 1924, Louis-Victor de Broglie formulated the de Broglie hypothesis, claiming that all matter,^[15][16] not just light, has a wave-like nature; he related wavelength (denoted as λ), and momentum (denoted as p):

${\displaystyle \lambda ={\frac {h}{p}}}$

This is a generalization of Einstein's equation above, since the momentum of a photon is given by p = ${\displaystyle {\tfrac {E}{c}}}$ and the wavelength (in a vacuum) by λ = ${\displaystyle {\tfrac {c}{f}}}$, where c is the speed of light in vacuum.
De Broglie's formula was confirmed three years later for electrons (which differ from photons in having a rest mass) with the observation of electron diffraction in two independent experiments. At the University of Aberdeen, George Paget Thomson passed a beam of electrons through a thin metal film and observed the predicted interference patterns. At Bell Labs, Clinton Joseph Davisson and Lester Halbert Germer guided their beam through a crystalline grid.
De Broglie was awarded the Nobel Prize for Physics in 1929 for his hypothesis. Thomson and Davisson shared the Nobel Prize for Physics in 1937 for their experimental work.

24 june2017. Learning physics basics. photoelectric effect..

24 june2017. Learning physics basics. photoelectric effect.

Einstein's explanation of the photoelectric effect

Main article: Photoelectric effect

The photoelectric effect. Incoming photons on the left strike a metal plate (bottom), and eject electrons, depicted as flying off to the right.

In 1905, Albert Einstein provided an explanation of the photoelectric effect, a hitherto troubling experiment that the wave theory of light seemed incapable of explaining. He did so by postulating the existence of photons, quanta of light energy with particulate qualities.
In the photoelectric effect, it was observed that shining a light on certain metals would lead to an electric current in a circuit. Presumably, the light was knocking electrons out of the metal, causing current to flow. However, using the case of potassium as an example, it was also observed that while a dim blue light was enough to cause a current, even the strongest, brightest red light available with the technology of the time caused no current at all. According to the classical theory of light and matter, the strength or amplitude of a light wave was in proportion to its brightness: a bright light should have been easily strong enough to create a large current.
Yet, oddly, this was not so.
Einstein explained this enigma by postulating that the electrons can receive energy from electromagnetic field only in discrete portions (quanta that were called photons): an amount of energy E that was related to the frequency f of the light by

where h is Planck's constant (6.626 × 10⁻³⁴ J seconds).
Only photons of a high enough frequency (above a certain threshold value) could knock an electron free.
For example, photons of blue light had sufficient energy to free an electron from the metal, but photons of red light did not.
One photon of light above the threshold frequency could release only one electron; the higher the frequency of a photon, the higher the kinetic energy of the emitted electron, but no amount of light (using technology available at the time) below the threshold frequency could release an electron.
To "violate" this law would require extremely high-intensity lasers which had not yet been invented.
Intensity-dependent phenomena have now been studied in detail with such lasers.^[14]
Einstein was awarded the Nobel Prize in Physics in 1921 for his discovery of the law of the photoelectric effect.