<p>Rotational temperatures of hydrogen molecules desorbed from plasma-facing surface was measured in three different tok

Kyoto

Fusion model hot off the wall

Predicting molecular rotational temperature for enhanced plasma recombination

<p>Schematic of the experiment: in an ion trap (grey), a laser wave (red) is sent onto HD+ molecular ions (yellow/red do

HHU DE

How atomic nuclei vibrate

Physicists have measured the wave-like vibration of atomic nuclei with an unprecedented level of precision.

Sandia

Stunning discovery: Metals can heal themselves

Microscopic cracks vanish in experiments, revealing possibility of self-healing machines

UFL

Evidence of Diverse Organic Material on Mars

Scientists, including UF astrobiologist Amy Williams, gain vital insights into Mars’ history and potential for supporting life

<p>An artist's composite image of a photo of the above-ground portion of the IceCube Neutrino Observatory along with the

NSF

First 'ghost particle' image of Milky Way galaxy captured by scientists

Elusive neutrinos reveal a portrait of our galaxy unlike any before.

Physics and Astronomy Online

Welcome to PhysLink.com - the physics and astronomy online portal! We feature latest physics news and editorials, extensive science reference and constants section, education section where you can ask our experts any physics or astronomy related question. Also, don't miss our fun page and our online science store.

ScienceIQ Facts

How Fast is Mach 1?

by Anton Skorucak and ScienceIQ.com

A Mach number is a common ratio unit of speed when one is talking about aircrafts. By definition, the Mach number is a ratio of the speed of a body (aircraft) to the speed of sound in the undisturbed medium through which the body is traveling.

It is said that the aircraft is flying at Mach 1 if its speed is equal to the speed of sound in air (which is 332 m/s or 1195 km/hr or 717 miles/hour.) An aircraft flying at Mach 2 is flying at twice the speed of sound in air, etc. Mach numbers are named after Ernst Mach (1838-1916), an Austrian philosopher and physicist. The term Mach number came into use in 1929.

Physics & Astronomy Facts

Saturn Voyager Mission Artwork depicts the spacecraft

Voyager Phone Home

After historic visits to Jupiter and Saturn, Voyager 1 is now on course to be the first human-made object to leave our solar system. In space for more than 25 years, it has already traveled farther th ...

Poincare's Chaos

Over two hundred years after Newton published his laws of planetary motion the King Oscar II of Sweden and Norway sponsored a most unusual competition that would discover a whole new science. ...

The Coriolis Effect

The Earth, rotating at about 1000 miles per hour (1,609 km/hr), influences the flow of air and water on its surface. We call this the Coriolis Effect, named after French scientist Gaspard Coriolis, wh ...

'What a wonderful and amazing scheme have we here of the magnificent vastness of the Universe! So many Suns, so many Earths ...!'

Christiaan Huygens
(1629-1695)

Science Sidebar

Beyond the bubbling volcano: Secrets to successful science fair projects

We have put together a list of tips to help you and your child find and develop a successful science fair project. In addition, we've added age appropriate guidelines when needed.

10 Ways to Keep Your Kids Interested In Science

Young children are natural scientists: they ask questions, pick up sticks and bugs outside, and are curious about the world around them. But as they get a bit older, many kids gradually lose their interest in science. Here are tips to get them excited about science again!

Cool Summer Science Projects

Summer is a natural time for learning about science. Longer days and the freedom from school schedules allow kids the opportunity to explore the world around them in new and exciting ways. Here are a few ideas to help get you started.