Sentences with phrase «of ordinary atoms»

When the antiprotons are close together, the strong force interaction overcomes the tendency of the like (negatively) charged particles to repel one another in the same way it allows positively charged protons to bind to one another within the nuclei of ordinary atoms.

Whereas «up» and «down» quarks instantly condense to form protons and neutrons, the addition of «strange» quarks makes a stable nugget that can grow far more massive than the nuclei of ordinary atoms, Witten proposed in 1984.

The Big Bang theory makes detailed predictions about the total number of ordinary atoms and about the relative abundance of deuterium (heavy hydrogen) and helium in the universe.

The team have made antihydrogen by replacing the proton nucleus of the ordinary atom by an antiproton, while the electron has been substituted by a positron.

Not exact matches

To understand the approach they're taking, let's revisit the fiery aftermath of the Big Bang, when most ordinary matter consisted of hydrogen atoms.

At present, the density of ordinary baryons and radiation in the universe is estimated to be equivalent to about one hydrogen atom per cubic metre of space.

Matter (both ordinary atoms and the invisible stuff called dark matter) once dominated the universe, but today it constitutes only a quarter of the content of the cosmos.

Ordinary matter, which makes up the atoms of familiar objects as well as stars and the visible portions of galaxies, accounts for just 4 percent of the cosmos.

Dark energy accounts for most of its mass, exotic dark matter comes in second place, and ordinary matter — the atoms we are made of — lands in a distant third place, with just 4.4 percent.

Ordinary hidden matter consists of atoms that emit little or no light.

In fact, the latest survey of the Big Bang's residual light suggests that more than 84 percent of the matter in the cosmos is of the «dark» variety: exotic particles unlike the ordinary atoms that make up our everyday world and the objects therein.

Dark atoms and molecules could perhaps clump together into galactic disks that overlap with the ordinary matter disks and spiral arms of galaxies such as Andromeda.

It also showed that ordinary matter — the atoms that make up galaxies, planets, and people — accounts for a paltry 4 percent of the universe's contents.

This is because its low temperature and high phase - space density make coherent stimulated emission possible: in an ordinary thermal gas of Ps, the Doppler shifts of the atoms would suppress lasing action.

That density depends upon the temperature of the Ps, but it is likely to be in the range of 1018 Ps atoms per cubic centimeter, which is about 3 % of the density of ordinary air.

As long as many of the ingredients of ordinary things were too scarce to be identified by any known method, the notion of a universe composed of atoms was still an abstraction.

Besides learning about that technique, however, I wanted to experience an atmosphere in which atoms were ordinary, everyday objects, like cups and saucers and grains of sand.

Created by essentially strapping a hacked Kinect to an iRobot Create (a sort of blank Roomba platform used by robotics developers) along with a gutted Intel Atom computer, the KinectBot uses the Kinect bar's 3D sensors in ways that'd make an ordinary Roomba hopelessly jealous.

It can not be seen, but if it exists it means that the ordinary matter made of atoms that scientists have been studying for three hundred years is only a very small, unimportant constituent of the Universe.

And that is that the people who were working out the consequences of quantum mechanics, shortly after quantum mechanics was discovered in 1924 and» 25, began to understand how atoms and molecules really worked, and they asked elementary questions about the world that even ordinary people might ask.

The Cryogenic Dark Matter Search (CDMS), buried half a mile deep in an old Minnesota iron mine to shield it from cosmic rays, searches for collisions between dark - matter particles called WIMPS and ordinary atoms in 19 hockey - puck - size hunks of germanium.

However, stars and galaxies account for only about 10 % of the inferred ordinary matter, and all told researchers can not account for up to half of atoms they think should exist.

In present - day estimates of the universe's makeup, ordinary atoms (such as those we detect as the visible universe) contribute only about 5 percent; the bulk of the cosmos takes the form of so - called dark energy, under whose influence the universe is expanding at an increasing clip.

A dark - matter particle entering a piece of ordinary solid matter might, on rare occasion, hit an atom, make it vibrate, and create a faint sound.

Nuclear physicists create the fireballs by colliding ordinary nuclei — made of protons and neutrons — in an «atom smasher» called the Relativistic Heavy Ion Collider (RHIC), a U.S. Department of Energy Office of Science User Facility at Brookhaven National Laboratory.

If it all sounds too radical, that may be a good thing: most direct detection experiments, which wait for an ordinary WIMP to collide with the nucleus of a heavy atom like germanium or xenon, have seen nothing (see «Going underground in search of dark matter strikes «-RRB-, for example.

A new measurement by RHIC's STAR collaboration reveals that the force between antiprotons (p with bar above it) is attractive and strong — just like the force that holds ordinary protons together within the nuclei of atoms.

All ordinary matter — atoms, molecules, people, stars, galaxies — are composed of just two types of quarks, and electrons.

Not exactly a wave in the ordinary sense, the swerve was a deviation from straight line motion postulated by the Greek philosopher Epicurus around 300 B.C. Unlike Aristotle, Epicurus believed in atoms, and argued that reality was built entirely from the random collisions of an infinite number of those tiny particles.

It describes particles, atoms and molecules but gives way to ordinary classical physics on the macroscopic scales of pears, people and planets.

Here the antiproton and a proton or neutron from an ordinary nucleus, presumably that of a silver or bromine atom in the photographic emulsion, would die simultaneously.

Baryons are particles of normal or «ordinary» matter (e.g., such as protons and neutrons) that make up more than 99.9 percent of the mass of atoms found in the cosmos.

The collisions free the quarks and gluons from their confinement within ordinary particles — the protons and neutrons that make up the nucleus of atoms — so nuclear physicists can study their interactions and the force that holds them together in the universe today.

In his disturbing child - abduction thriller, The Captive, writer / director Atom Egoyan explores the ambiguous nature of the human condition and how ordinary people react when drawn into dreadful circumstances.

Heavy water: Water containing a significantly greater proportion of heavy hydrogen (deuterium) atoms to ordinary hydrogen atoms than is found in ordinary (light) water.

So, Chapman proposed that as soon as one of these oxygen atoms («free radicals») collided with an ordinary diatomic oxygen molecule, they would react together to form a single triatomic ozone molecule (Figure 18).

1) that everything was made up of smaller indivisible objects (atoms) 2) that the earth went round the sun 3) that life started in the mud around the edges of the waters of the earth 4) that the wind was a thin substance so thin that it was invisible, but still made of ordinary matter just like the earth and the water

Ordinary atoms, once ionized by the removal of one or more electrons, also emit a continuum EM spectrum, which is not quantized, because a newly captured free electron can have any initial energy before being captured by the ion.