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POW! Nikola Tesla: "If you want to know the secrets of the universe, think in terms of energy, frequency and vibration."🕹#powcademy
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by Steve Mould

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Φούσκες και φωτιά. Τι άλλο να ζητήσει κανείς;

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Φούσκες και φωτιά. Τι άλλο να ζητήσει κανείς;

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https://www.facebook.com/SayWhatCOM/videos/441175703383688/?t=171

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Καθημερινή Φυσική

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Η πιο διάσημη εξίσωση στη Φυσική

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Bill uses a bucket of propylene glycol to show how a fiber optic cable works and how engineers send signal across oceans. More info at http://www.engineerguy.com. You can translate captions at http://www.engineerguy.com/translate

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Εργαστηριακός Οδηγός

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Εργαστηριακός Οδηγός

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Πώς παγώνει μια σαπουνόφουσκα;

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Πώς παγώνει μια σαπουνόφουσκα;

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What Happens When You Blow Soap Bubbles in Freezing Cold Weather

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Uploaded by AmazingPandph on 2015-11-11.

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Ακτινόμετρο Crookes

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Ακτινόμετρο Crookes

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Οι σταγόνες του πρίγκιπα Rupert

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Οι σταγόνες του πρίγκιπα Rupert

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Mystery of Prince Rupert's Drop at 130,000 fps - Smarter Every Day 86

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"Goggle Up! Science is about to happen...Share by Tweet: http://bit.ly/YAsk8M Facebook: http://bit.ly/PrinceRupert READ THE ADDITIONAL INFO HERE! (Click "Show More"!) Please help me justify putting this much time and effort into a video by clicking "LIKE" and SHARING this as much as possible.

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Πώς να σπάσεις την ταχ

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Πώς να σπάσεις την ταχύτητα του φωτός στην αυλή σου ~περίπου

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You can break the speed of light in your back yard! (but don't worry, Einstein is still right) Tweet it - http://bit.ly/rOv00A Facebook it - http://on.fb.me/tOzkUm minutephysics is now on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

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Περίπου αυτά που κάναμ

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Περίπου αυτά που κάναμε σήμερα 29/11/13

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Πώς λειτουργεί η σβούρα που αναποδογυρίζει

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Πώς λειτουργεί η σβούρα που αναποδογυρίζει

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FYSIKbasen.dk - The Danish database for physics demonstration experiments.

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Φτιάχνουμε ημισφαίρια Μαγδεμβούργου;

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Φτιάχνουμε ημισφαίρια Μαγδεμβούργου;

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In the spring of 1654, German scientist Otto von Guericke staged a dramatic demonstration of his new invention, the vacuum pump. Guericke was the mayor (Bürgermeister) of Magdeburg, and he arranged for a public demonstration in the town square. Two teams of 15 horses would try to pull apart two 20"-diameter metal hemispheres.

The hemispheres were not bolted, welded, glued, or otherwise mechanically connected to one another. Instead, the air inside the sphere had been evacuated by means of von Guericke's new vacuum pump. Strain and pull as they might, the force of the vacuum was stronger than the 30 horses - the teams could not part the sphere.

The Magdeburg Hemispheres, as they came to be known, were a pair of large copper hemispheres with mating rims. Von Guericke applied a thick coating of grease to the rims, attached his new vacuum pump apparatus, and pumped out a good bit of the air, producing a strong vacuum inside.

How hard would those horses have to pull in order to separate the hemispheres? To figure this out, first calculate the area of a 20"-diameter circle: πr ² = π10 ² = 314 square inches (in ²). Air pressure at sea level is about 14.7 pounds per square inch (psi, or lbf/in ²). If von Guericke's pump was capable of pulling a near-vacuum of about 1lbf/in ², then the force required to pull the halves apart is 314in ² × (14.7-1) lbf/in ² = 4,300 pounds of force.

The hemispheres could sustain a load of well over 2 tons!

It's easy and fun to build your own Magdeburg Hemispheres, although we'll use aluminum cake pans instead of copper hemispheres. Hooking up horses to pull the pans apart is definitely optional!

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In the spring of 1654, German scientist Otto von Guericke staged a dramatic demonstration of his new invention, the vacuum pump. Guericke was the mayor (Bürgermeister) of Magdeburg, and he arranged for a public demonstration in the town square. Two teams of 15 horses would try to pull apart two 20"-diameter metal hemispheres.

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Εξαιρετικές ιδέες για πειράματα από το ΜΙΤ

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Εξαιρετικές ιδέες για πειράματα από το ΜΙΤ

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MIT Physics Department's Technical Services Group (formerly Physics Lecture Demonstration)

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Πώς λειτουργεί η ηλεκτροστατική μηχανή Wimshurst

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Πώς λειτουργεί η ηλεκτροστατική μηχανή Wimshurst

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A Wimshurst electrostatic generator - http://en.wikipedia.org/wiki/Wimshurst_machine - , working on the principle of induction, generates high voltage differences and sparks between two movable electrodes. By increasing the distance between the electrodes, higher potential differences can be built up.

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Πολλές-πολλές ιδέες για πειράματα. Ψάξτε το καλά.

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Πολλές-πολλές ιδέες για πειράματα. Ψάξτε το καλά.

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Hungry for fresh, exciting science activities based in amazing phenomena? Science Snacks are hands-on, teacher-tested, and use cheap, available materials. Satisfy your curiosity without ever getting full.
Don't miss our Special Collections.

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Science Snacks: Projects and Activities You Can Do!

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Hungry for fresh, exciting science activities based in amazing phenomena? Science Snacks are hands-on, teacher-tested, and use cheap, available materials. Satisfy your curiosity without ever getting full. Don't miss our Special Collections.

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Ένα παιχνίδι για το πείραμα στο CERN. Μάλλον θα δημιουργήσει περισσότερες απορίες από όσες θα λύσει αλλά δεν πειράζει!

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Ένα παιχνίδι για το πείραμα στο CERN. Μάλλον θα δημιουργήσει περισσότερες απορίες από όσες θα λύσει αλλά δεν πειράζει!