CASSINI SPACECRAFT

cassini spacecraft

This colorful view from NASA's Cassini mission is the highest-resolution view of the unique six-sided jet stream at Saturn's north pole known as "the hexagon." This movie, made from images obtained by Cassini's imaging cameras, is the first to show the hexagon in color filters, and the first movie to show a complete view from the north pole down to about 70 degrees north latitude. Image credit: NASA/JPL-Caltech/SSI/Hampton University
C:\Users\win7\Desktop\PIA17653.gif

POSTER FOR ASTRONOMY LESSON

ACCELERATING EDUCATION: AURORA

ACCELERATING EDUCATION: AURORA

ACCELERATING EDUCATION: Space Oddity---Music in space!!!!

ACCELERATING EDUCATION: Space Oddity---Music in space!!!!

ACCELERATING EDUCATION: SOLAR STORM IN GREECE........

ACCELERATING EDUCATION: SOLAR STORM IN GREECE........: Σε κατάσταση επιφυλακής έχουν τεθεί οι επιστήμονες, αλλά και οι αρμόδιες αρχές για τη μεγάλη μαγνητική καταιγίδα που αναμένεται να «χτυπ...

ACCELERATING EDUCATION: ACCELERATING EDUCATION: FEYNMAN

ACCELERATING EDUCATION: ACCELERATING EDUCATION: FEYNMAN: ACCELERATING EDUCATION: FEYNMAN : Πράγματι, όπως εκτίμησε και ίδιος ο Feynman στον πρόλογο του από τις διαλέξεις φυσικής, όταν διαπίστωσε ό...

ACCELERATING EDUCATION: Solar Strom

ACCELERATING EDUCATION: Solar Strom: Solar nuclear fussion

November 8, 1895: Roentgen's Discovery of X-Rays.

One of the earliest photographic plates from Roentgen's experiments was a film of his wife, Bertha's hand with a ring, produced on Friday, November 8, 1895.



more in the link

Cassini-Photo

new photo from cassini

Density

ACCELERATING EDUCATION: Electric Current

ACCELERATING EDUCATION: Electric Current

Thermal Effect of Current

Magnetic Effects

Laplace Force

ACCELERATING EDUCATION: INERTIA

ACCELERATING EDUCATION: INERTIA: Inertia  is the property of bodies to resist changes in motion. Things at rest tend to stay at rest, things moving tend to continue movi...

Curiosity 12 months

Nasa have fun with curiosity....

THE FEYNMAN SERIES - Think Like A Martian

http://www.youtube.com/v/CJ8MzWncFfQ?autohide=1&version=3&autohide=1&feature=share&attribution_tag=ZTGRD7W6WguYNR33-ILCtA&showinfo=1&autoplay=1



more....video...

NEWTON THEORY

Watch these videos, if you want to learn anything about Newton.

proposed by Alexis Zamanis.

ELECTROMAGNETISM

experiment

higgs

higgs 

SIMPLE HARMONIC MOTION

Στο παρακάτω σχήμα φαίνεται η γραφική παράσταση της δύναμης επαναφοράς με την απομάκρυνση για δύο Α.Α.Τ.

The following diagram describes how the total force depence on the displacement (F-x)

                                           

Δύο από  τα παρακάτω διαγράμματα  αντιστοιχούν στις προηγούμενες ταλαντώσεις. Προσδιορίστε ποια γραφική παράσταση της δυναμικής ενέργειας σε συνάρτηση με την απομάκρυνση αντιστοιχεί σε κάθε μια.

Two from the following  diagrams represents how the potential energy change with desplacement (P.E.-x) . Choose the correct two diagrams who matches with each F-x. 

                                    

  Διάγραμμα Α

                                                   

Διάγραμμα Β          

Διάγραμμα Γ

Διάγραμμα Δ

ACCELERATING EDUCATION: GENERAL RELATIVITY: True motion is the opposite of...

ACCELERATING EDUCATION: GENERAL RELATIVITY: True motion is the opposite of...:  In the everyday description of the world, rest is the absence of velocity. 

With Galilean and special relativity, rest became inertial mo...

ACCELERATING EDUCATION: FROM SPACE TO QUARK

ACCELERATING EDUCATION: FROM SPACE TO QUARK:              TRAVELING THROUGH THE UNIVERSE

Tunguska Anti matter or meteorite

Greek      English

ELECTRICITY

ELECTRICITY                                                           

0 Fahrenheit --μηδέν Φαρεναιτ

The Zero Point on The Fahrenheit Scale Is Based On Frozen Salt Water

Ήταν η πιο χαμηλή θερμοκρασία που μπορούσαν να δημιουργήσουν οι άνθρωποι την εποχή εκείνη 1724 στο εργαστήριο. Την  πέτυχε με το σημείο θερμικής ισορροπίας ενός μίγματος νερού, πάγου και χλωριούχου αμμωνίου και της έδωσε την τιμή μηδέν (  0 ⁰F ).  Το μηδέν αυτό αντιστοιχούσε και στην πιο  χαμηλή θερμοκρασία που είχε παρατηρηθεί τον πιο κρύο χειμώνα, στη γενέτειρά του το Ντάντσιχ.

Σε βαθμούς της κλίμακας Κελσίου, η οποία ακολούθησε είκοσι χρόνια αργότερα,  η θερμοκρασία αυτή είναι περίπου -18 ^οC. περισσότερα

Κριμιζής-Διάστημα

amazing .....

Self fixing plastic

ASTRONOMY

NICE PHOTO


NASA's Voyager 1 spacecraft nearly 12 billion miles from Earth is still phoning home from interstellar space, and a new NASA photo captures that radio signal as pale blue speck in a cosmic ocean. 






invitation

Photo Contest

AAPT High School Physics Photo Contest

Entries are welcome every year between March 1 and May 15 for that year's competition.

PHOTO 2013

FIRST LESSON!

 First lesson must have nothing more than an experiment and the pleasure to watch it!!!

you can see how...
http://www.acceleratingeducation.com/p/experiments.html

Only physics can explain it: Conservation o f Energy

Many transformations of energy can see someone in the following video.
Students in France enjoy their summer,  feeling the amazing  alternations of kinetic and potential energy.





 As the kid goes through its twists, turns, rolls, and loops, it gains and loses its initial potential energy. Energy changes from potential into kinetic energy and back into potential energy.

How are you enjoy your summer?

Two-photon exchange in ....

 two-photon exchange (TPE) in elastic electron scattering off the trinucleon systems, 3He and 3H. 

GENERAL RELATIVITY

VIDEO.......AND MORE

ANCIENT ASTRONOMY

 The Venus of Laussel is a 1.5 foot high figurine cut in limestone, between 25,000 to 30,000 years in age. Image courtesy of Joseph (2002).

Thus, we should not be surprised that the rock art in Lascaux (French Dordogne) depict what may be the oldest drawings of the constellations (Antequera, 1994; Rappenglueck, 1999), created more than 16,000 years ago, with the ubiquitous Pleiades −the most international asterism of the firmament − already riding on the back of the great celestial bull .
..more details

Relativistic collisions-interactions and Feynman Diagrams

Tachyons the  exchanged objecst appear only during relativistic collisions, never on their own. They are called virtual objects, to distinguish them from the usual, real objects, which we observe everyday.
In the following diagram the first object ( left line) has changed its momentum
before the second one.That would mean that there is a short interval when momentum
and energy are not conserved! The only way to make sense of the situation is to assume that there is an exchange of a third object, drawn with a dotted line (virtual particle).

Tachyon is always a virtual object and its mass is an imaginary number!
On top of that, we also see directly from the  graph that the exchanged object
moves faster than light. It is a tachyon, from the Greek ταχύς ‘rapid’. In other words,
collisions involve motion that is faster than light! That collisions are indeed
the only processes where tachyons play a role in nature.

More details you can read at Christoph Schiller's  Motion Mountain

FEYNMAN

Interesting educational Method for Teaching Feynman Diagrams

http://micro-kosmos.uoa.gr/en/en-index.htm

or you can see the video in the youtube 

Interesting technological  prosedure for teaching Feynman Diagrams is the following program as you  can see in the video:     

interaction e-e

 the interaction of two photons,

known as pair production γ +γ ➝ e- + e+. (One of

those photons is normally part of a strong static field

that interacts with a high energy passing photon.)                   

the procedure can be seen in the following video:

more detail click here

Curiosity's First Year on Mars Video credit: NASA/JPL

Curiosity video

Curiosity Cam

Ο ΓΑΛΙΛΑΙΟΣ!!

Η ζωη του Γαλιλαιου!!!

περισσότερα

Teaching Feynman Diagrams with Technology

Interesting technological  prosedure for teaching Feynman Diagrams is the following program as you  can see in the video:  

interaction e-e

 the interaction of two photons,

known as pair production γ +γ ➝ e- + e+. (One of

those photons is normally part of a strong static field

that interacts with a high energy passing photon.)                   

the procedure can be seen in the following video:

This procedure is based on the article :

Teaching Electron—Positron—Photon Interactions with Hands-on Feynman Diagrams,  The Physics Teacher -- April 2013 -- Volume 51, Issue 4, pp. 232, George Kontokostas and George Kalkanis.

and also based on the greek presentation :Ψηφιακές Αναπαραστάσεις και Τεχνικές για την Εκπαιδευτική Αξιοποίηση των Διαγραμμάτων Feynman, Bόλος 2013.

More details you can find at the page http://www.acceleratingeducation.com/p/feynman.html

The Maribo Meteorite and IPHO

The Maribo Meteorite...........

and the theorical problem of olimpiad.


Introduction
A meteoroid is a small particle (typically smaller than 1 m) from a comet or an asteroid. A
meteoroid that impacts the ground is called a meteorite.
On the night of 17 January 2009 many people near the Baltic Sea saw the glowing trail or fireball of
a meteoroid falling through the atmosphere of the Earth. In Sweden a surveillance camera recorded
a video of the event, see Fig. 1.1(a). From these pictures and eyewitness accounts it was possible to
narrow down the impact area, and six weeks later a meteorite with the mass 0.025 kg was found in
the vicinity of the town Maribo in southern Denmark. Measurements on the meteorite, now named
Maribo, and its orbit in the sky showed interesting results. Its speed when entering the atmosphere
had been exceptionally high. Its age, year, shows that it had been formed shortly after
the birth of the solar system. The Maribo meteorite is possibly a part of Comet Encke.
The speed of Maribo
The fireball was moving in westerly direction, heading 285 relative to north, toward the location
where the meteorite was subsequently found, as sketched in Fig. 1.1. The meteorite was found at a
distance 195 km from the surveillance camera in the direction 230 relative to north.

EDUCATIONAL PROPOSAL FOR THE PRINCIPLES OF GENERAL RELATIVITY

ACCELERATING EDUCATION: relativistic baseball

ACCELERATING EDUCATION: relativistic baseball: http://what-if.xkcd.com/1/

44th International Physics Olympiad

The 44th International Physics Olympiad will be held in Copenhagen, Denmark, 
                                                   7th - 15th of July,
                                                           2013
                                         

                                               

                                                      http://ipho2013.dk/

                                                                 Come

Greek Team

Problems and solutions

Bronze metal for Greece     Ceremony

Stavros Efthymiou  

Pieces of a meteorite!!!

Russia
Argentina

ΔΙΑΦΗΜΙΣΗ- Απόκτησε τον δικό σου μετεωρήτη

Το κοστος κάθε κομματιού είναι 10 Eυρώ!

email παραγγελίας : gakon67@hotmail.com

Meteor Crater

Dangerous Planet

                                        Dangerous Planet

4-quarks = ONE PARTICLE

New particle
CHARM-ANTICHARM- UP- ANTIDOWN!

Solar Strom

Solar nuclear fussion

HOLIDAY IN GREECE!!!

Projectile Motion

You can begin with this video

then continue with these exercises:

Exercise 1  

Exercise 2

ACCELERATING EDUCATION: The site ACCELERATING EDUCATION in London.

ACCELERATING EDUCATION: The site ACCELERATING EDUCATION in London.: Commercial of site in London.

ACCELERATING EDUCATION: FEYNMAN

ACCELERATING EDUCATION: FEYNMAN: Πράγματι, όπως εκτίμησε και ίδιος ο Feynman στον πρόλογο του από τις διαλέξεις φυσικής, όταν διαπίστωσε ότι ο αριθμός των φοιτητών του ...

SOLAR STORM IN GREECE........

Σε κατάσταση επιφυλακής έχουν τεθεί οι επιστήμονες, αλλά και οι αρμόδιες αρχές για τη μεγάλη μαγνητική καταιγίδα που αναμένεται να «χτυπήσει» και τη χώρα μας σήμερα Τρίτη.



περισσότερα

Β ΛΥΚΕΙΟΥ ΦΥΣΙΚΗ ΚΑΤΕΥΘΥΝΣΗΣ

ΘΕΡΜΟΔΥΝΑΜΙΚΗ

Άσκηση

ΕΠΑΓΩΓΗ

Extreme Solar Storm Could Cause Widespread Disruptions on Earth

sun storm

Space Oddity---Music in space!!!!

-----Earth Magnetic Field ----Electromagnetic induction---

An aeroplane is flying with velocity v at right angles to the Earth’s magnetic field B near the
North pole of the Earth, as shown in the plan view below. The plane’s wingspan (distance between
wingtips) is L. The wingtips are labelled P and S .

(a) Consider an electron of charge magnitude e in the metal wing of the plane at the point shown
by a dot in the figure.
(i) In what direction will this electron experience a magnetic force due to its motion in the
magnetic field? Draw a vector on the diagram to represent the force.
(ii) State an expression for the magnitude of the force on the electron in this situation


(b) While the plane is flying steadily in the magnetic field, the electrons in the wing experience
this magnetic force but do not move along the wing; such motion is opposed by an electric
field arising in the wing.
(i) Explain how this electric field originates, and draw a vector in the diagram to show its
direction.

(ii) Explain why the electric force on the electron is exactly equal to the magnetic force, in
this situation. (Hint: imagine this were not the case and consider what would happen
next.)
(c) Show that the magnitude of the electric field produced in the wing is given by E = vB .

(d) Derive an expression for the induced potential difference which arises between the tips of the
moving wing. (In terms of the length L, speed v and magnetic field strength B.)

(e) Calculate the potential difference developed between the wingtips if the plane flies at
200 ms−1 (720 kmhr−1 ) in the Earth’s field of 8×10^−5 T near the pole and the wingspan is
30 m.


(f) Would the potential difference between the wingtips still arise if the plane were flying near
the Equator? Explain.

[2]
(g) Suppose one wanted to check if there really was a potential difference between wingtips. If
one connected a moving-coil voltmeter between the wingtips, would it give a reading?
Explain.



(h) Will there also be a potential difference between the nose and the tail of the plane? Explain
why or why not.

ΠΑΝΕΛΛΗΝΙΟ ΣΥΝΕΔΡΙΟ ΔΙΔΑΚΤΙΚΗΣ ΤΗΣ ΦΥΣΙΚΗΣ ΣΤΟ ΒΟΛΟ

Πρόγραμμα

Ενδιαφερουσες ομιλίες


Α) Φράκταλς, Χάος, Πολυπλοκότητα: Διδακτικές Προσεγγίσεις


Κωνσταντίνος Σκορδούλης
Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης
Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών


1.Φράκταλς
. Οι Απόψεις Μαθητών Δευτεροβάθμιας Εκπαίδευσης και Φοιτητών για την έννοια της Διάστασης
. Ικανότητα Επίλυσης Προβλήματος στη Fractal Διάσταση από Μαθητές της Β΄Λυκείου


2. Χάος
. Εκπαιδεύοντας Φοιτητές του Π.Τ.Δ.Ε. και μαθητές Β’ Λυκείου με το χαοτικό εκκρεμές

3. Πολυπλοκότητα

 Χρήση Απλών Μορφών Πολυ-πρακτορικών Συστημάτων για τη Διδασκαλία Βασικών Ιδιοτήτων των Πολύπλοκων Συστημάτων

Β)\Ψηφιακές Αναπαραστάσεις και Τεχνικές για την Εκπαιδευτική Αξιοποίηση των Διαγραμμάτων Feynman

Γεώργιος Θεοφ. Καλκάνης, Γεώργιος Κοντόκωστας

Εργαστήριο Φυσικών Επιστημών, Τεχνολογίας και Περιβάλλοντος,

Παιδαγωγικό Τμήμα Δ.Ε., Πανεπιστήμιο Αθηνών

Στην  ερευνητική διαδικασία, που περιγράφουμε εδώ, χρησιμοποιήσαμε την ψηφιοποιημένη εικόνα του ίδιου «στοιχειώδους» διαγράμματος e– + e+ ---   γ (εικόνα 1α) και την αντίστροφή του εμπρός-πίσω (εικόνα 1β), με τον χρόνο να εξελίσσεται από τα κάτω προς τα επάνω των εικόνων.

. Με συνδυασμούς, ανά δύο, των εικόνων 1 και 2 προκύπτουν τα διαγράμματα Feynman και άλλων πλέον σύνθετων αλληλεπιδράσεων μεταξύ e–, e+ και γ,

Εικόνες 3, 4 (από τα αριστερά προς τα δεξιά). Εικόνα 3: αλληλεπίδραση δύο ηλεκτρονίων ανταλλάσσοντας ένα εικονικό φωτόνιο, γνωστή ως σκέδαση ηλεκτρονίου-ηλεκτρονίου e- + e- --e- + e-. Εικόνα 4: αλληλεπίδραση μεταξύ ενός ηλεκτρονίου και ενός ποζιτρονίου, γνωστή ως εξαΰλωση ηλεκτρονίου-ποζιτρονίου e+ + e- -- γ + γ

Εικόνες 5, 6 (από τα αριστερά προς τα δεξιά). Εικόνα 5: αλληλεπίδραση δύο φωτονίων, γνωστή ως
διπλή γένεση ενός ηλεκτρονίου και ενός ποζιτρονίου γ + γ --- e- + e+. Εικόνα 6: αλληλεπίδραση μεταξύενός ηλεκτρονίου και ενός φωτονίου, γνωστή ως σκέδαση ηλεκτρονίου-φωτονίου
 e- + γ --e- + γ.



Αξιοποιώντας την ίδια τεχνική είναι δυνατόν να αναπαραστήσουμε με διαγράμματα Feynman
και άλλες αλληλεπιδράσεις / διαδικασίες που μπορεί να συμβούν μεταξύ quarks (up, down, charm,
strange, top, bottom), λεπτονίων (electron, muon, tau, electron neutrino, muon neutrino, tau
neutrino) και σωματιδίων πεδίου (photon, gluon, z boson, w boson). Ως παράδειγμα, μπορούμε να
συνθέσουμε το διάγραμμα Feynman για τη β-διάσπαση (βλ. εικόνα 7).

Εικόνα 7: Αναπαριστά την αλληλεπίδραση / διαδικασία u + d --- v + e- (με ανταλλαγή W-) που
είναι γνωστή ως β-διάσπαση.
                                                                εδω ολη η δημοσίευση