Classical physics

The history of temperature measurement. The illustration was prepared using DALEE and is not a scientific illustration

What is temperature?

  • No comments
In the upcoming series of posts, I will deal with selected chapters from the fascinating history of thermodynamics. In the first post we opened with the basic question: What is temperature?
The cover of Leibniz's book. PR photo

Chapter from Leibniz. The best of all possible worlds by Michael Keszampe

  • No comments
From German: Aviad Shtir, Philosophy and Science series edited by Yehuda Meltzer, Attic Books and Yediot Books
This is how induction cookers work, including a cross-section showing their interior. The figure shows the following components: the ceramic glass surface, the induction coil below it, the power supply unit, a ferromagnetic pot on the stove. The arrows in the figure indicate the magnetic field created by the induction coil and heating the pot. The image was prepared using DALEE and is not used as a scientific image. The text that appears in it is also in the best DALEE tradition "about".

Induction cookers: the next generation in cooking?

  • 8 תגובות
Induction stoves do not heat up and yet heat the food. The secret lies in the magnetic field
complex networks. Illustration: depositphotos.com

The ability to simply explain complex physical networks

Doctoral student Benia Gros from the Department of Physics, the President's Scholar, has so far published 15 articles and one book, and presented his works dealing with dependent physical networks, at 9 conferences
A whirlpool in the water. Illustration: depositphotos.com

Turbulence also maintains "social distancing"

The research was able to find hidden order in apparently "messy" rotating physical systems, such as proteins and vortices
Doppler effect. Illustration: shutterstock

Spotlight on the Doppler effect

If you have ever stood on the side of a highway, or an ambulance passed you by at high speed, you must have noticed the change in tone that occurs exactly when the vehicle or the siren passes you by: the noise "drops" sharply
Hurricanes are approaching the USA. Photo: depositphotos.com

The conservation laws common to hurricanes and the movement of proteins

  • 2 תגובות
broken glass. Photo: Gilbert Ebrahimi, unsplash

"Surprising results": research reveals for the first time what happens at the end of the crack

  • No comments
This research, recently carried out by Prof. Jay Feinberg and Neri Berman from the Rekh Institute of Physics, was published in the prestigious journal Physical Review Letters. The study revealed, for the first time, the behavior in the immediate vicinity of the crack tip.
Huge waves. Illustration: depositphotos.com

Each wave carries a souvenir (from another wave)

Ice crystals in an environmental scanning electron microscope (ESEM), courtesy of Dr. Anna-Eden Kosoy-Simkov, Department of Chemical Research Infrastructures

go with the flow

In a series of experiments, Weizmann Institute of Science scientists solved the puzzle of the relationship between electric current and the freezing temperature of supercooled water. Beyond the scientific interest, their findings may lead to the promotion of applications in diverse fields
Isaac Newton rewrites the laws of physics. Illustration: shutterstock

Researchers from Israel and Chile solved Newton's three-body puzzle from 330 years ago

  • 19 תגובות
Illustration: shutterstock

The physics of speed - behind the scenes of the number 1 cause of accidents

About lies we tell ourselves, the laws of traffic and Newton's, and how we can look at traffic jams in a positive light

On the infamous piston and other problems

  • No comments
Prototype construction of the detector of the DUNE project. Source: Fermi National Accelerator Laboratory.

The neutrino puzzle

  • 3 תגובות
In the study, the scientists examined collisions that occur between the molecules. Collisions of atoms have been studied in the past, but atoms - according to classical physics - are spherical, while molecules have an elongated structure. The structure of a colliding body affects the way it will move after the collision. Will elongated molecules behave differently from spherical atoms? And is knowing their shape enough to predict the outcome of the collision? Illustration: pixabay.com.

Cold, getting cold

  • No comments
Microwaves are electromagnetic waves used for communication, for locating objects such as airplanes, for astronomy and physics research, and of course for rapid heating of food. Photo: alexunderwood910.

The wave of the microwave

  • 4 תגובות
New theories that attempt to unify quantum computing and space-time physics may provide new insights into the fabric of the universe. Chart: Johnstone / Wikimedia.

Bits interwoven in space-time

  • 8 תגובות
In the study, the scientists examined collisions that occur between the molecules. Collisions of atoms have been studied in the past, but atoms - according to classical physics - are spherical, while molecules have an elongated structure. The structure of a colliding body affects the way it will move after the collision. Will elongated molecules behave differently from spherical atoms? And is knowing their shape enough to predict the outcome of the collision? Illustration: pixabay.com.

Changes temperature, changes shape

  • No comments
Water pressure - Figure: City of Sydney

no pressure!

  • One response
Movement of gases in space. Illustration < a href="http://www.shutterstock.com/gallery-1964531p1.html">Peter Kai/Shutterstock

Basics of blitzkrieg / Tim Faluka

  • No comments
popcorn. Photo: shutterstock

An introductory course to the physics of popcorn / Rachel Nauer

  • 3 תגובות
liquids. Photo: shutterstock

The situation is fluid

  • One response
A sheet of water is created when a jet hits a target. In the picture, a sheet of water is created when water flowing from the faucet hits the spoon above the kitchen sink. This sheet will eventually break down into droplets; While sheets of liquid may seem like an abstract image, the physics that govern the process are relevant to fields ranging from fuel injection to irrigation. Photo by Dr. John Kolinski

How are fragments formed in the material and what is the connection between washing paws under the tap and the ignition system of the car engine.

  • No comments
Italian stamp from 1999 in honor of Alessandro Volta. Photo: Neftali / Shutterstock.com

270th birthday of the inventor of the electric battery Alessandro Volta

  • 6 תגובות
Sony's HoverBall reaches a speed of 5 meters per second. Photo: Sony's computer science lab

The hovering ball / Larry Greenmire

  • 3 תגובות
sound waves. Illustration: shutterstock

A one-way road to sounds / Charles K. Choi

  • 2 תגובות
A football consisting of the flags of the teams participating in the 2014 FIFA World Cup tournament held in Brazil. Illustration: shutterstock

The physics behind football

  • One response
From the FIFA 2014 game.

The science of FIFA / Julian Chayat

  • 4 תגובות
sound waves. Illustration: shutterstock

A Ben-Gurion graduate who is on post at MIT has discovered a new way to affect wave propagation

  • 2 תגובות
From the right: Dr. Zvi Telusti and Prof. Elisha Mozes. Internal grammar

Closed on himself

  • 5 תגובות
The cover of the book was promoted in the classical Torah of the Fields by Asher Yaholum

New book: Progress in classical field theory

  • 7 תגובות
Robert Boyle

Physics - demons, entropy and the journey to absolute zero / Mark G. Reisen

  • 11 תגובות
Ernst Friedrich Chaldani

Head-to-head with Newton: on Ernst Chaldani and the meteorites

  • 106 תגובות
The Minister of Education awards the gold medal to Gal Dor, from Ahad Ha'am High School in Petah Tikva, at the end of the Asian Youth Physics Olympiad (May 8, 2011), which was held in Tel Aviv. Photo: Spokesperson of the Ministry of Education

Gal Dor from Ahad Ha'am High School in Petah Tikva won a gold medal in the Asian Physics Olympiad

  • 6 תגובות
Firefighters put out a fire in Canada. From Wikipedia

Extinguishing fires without water - and with a little electricity

  • 13 תגובות
Guess who it is

Happy birthday Einstein: Is it possible to sense the lengthening of time from Einstein's theory of relativity?

  • 68 תגובות
Plasma bulb. From Wikipedia

Plasma healing - an alternative to antibiotics?

  • 6 תגובות
From the right (standing) Dr. Yevgeni Stambolchik, Prof. Yitzhak Maron, Kristina Stolberg, Guy Rosenzweig, Pesi Meiri. (seated): Dr. Eyal Krupp, Dimitri Mikitchuk

In short - particle accelerators

  • One response
Right: Erez Gershenval and Prof. Ilya Aberbuch. whirlwind

who moved my molecule

  • 2 תגובות
From the right: Ran Vardimon, Regev Ben-Zvi, Dr. Oren Tal, Roi Kazaz and Tamar Yelin

A very narrow bridge: is it possible to produce electronic components whose size does not exceed that of a single molecule?

  • No comments
Capacitor diagram based on parallel plates

Where did the energy go?

  • 76 תגובות
NIST scientists compared a pair of the finest atomic clocks available to prove that indeed, as relativity predicts, going up a flight of stairs accelerates your aging. Figure courtesy of NIST

A pair of aluminum atomic clocks verify Einstein's twin paradox and time dilation

  • 27 תגובות
Dr. Igor Lubomirsky.

Hot, warming, freezing

  • 11 תגובות
From the right: Yoel Rakah, Gideon Yekothiali, Yigal Ptolemy and Amos de Shalit, after a scientific conference in Basel, September 1949

nuclear shell path (of the atom)

  • One response
From left to right: Jingle Liu, Xi-Cheng Zhang, Jianming Dai. Credit: Rensselaer/Daria Robbins

Breakthrough in remote sensing of hidden explosives

  • One response
To find two channels that have no overlap between them, you have to "jump" five channels

Broadcast and let broadcast

  • 2 תגובות
Bubbles in the beer

Some things you didn't know about your beer (unless you studied thermodynamics)

  • 8 תגובות
Dr. Eran Buchbinder. Cracks

breaking point

  • 6 תגובות
Towns and Sholov adjust the maizer. Photo: Bell Laboratories

Laser's 50th birthday

  • 8 תגובות
The orbit of the Lisa system around the Sun. Image: NASA/JPL

NASA and the European Space Agency's large detector to prove Einstein's gravitational waves

  • 34 תגובות