Sentences with phrase «nuclear chain reactions»

So they drafted a second set of letters in drafts to the President of the United States, warning him about nuclear chain reactions and their military potential.

«It may become possible to set up nuclear chain reactions,» the letter told President Roosevelt.

Forty - five years after Humanae Vitae, it now seems clear that the invention of the oral contraceptive pill (to adopt one reference point for the broader contraceptive revolution) was one of the three achievements of 20th - century science with truly world - historical impact, the other two being the creation of the self - sustaining nuclear chain reaction and the unraveling of the DNA double helix.

The anniversary of the first controlled nuclear chain reaction marks an achievement of immigrants who served America in World War II.

Sometimes, a few seconds after the fission occurs in a nuclear chain reaction, additional neutrons are released.

After Szilárd fled the Nazis, he made his way to England and then New York, where he worked at Columbia University on ways to create a nuclear chain reaction, an idea he had conceived while waiting at a stoplight in London a few years earlier.

They called this 20x6x25 - foot setup Chicago Pile Number One, or CP - 1 for short — and it was here they obtained world's the first controlled nuclear chain reaction on December 2, 1942.

Figuring out how to create and control the nuclear chain reaction was the foundation for the 448 nuclear reactors producing energy worldwide today.

The science has come a long way since Szilard's vision and Fermi's proof of a controlled nuclear chain reaction.

As a result, the nuclear chain reaction in their Chicago experiment could have spiraled out of control, with potentially devastating results.

These reactors have the intriguing feature that the water used to cool the core and run the generating turbine is also essential to maintaining a nuclear chain reaction.

In the movie, a «chain reaction» occurred, but it was difficult to determine if this was a nuclear chain reaction or just a big hydrogen explosion.

It is the intellectual equivalent of a nuclear chain reaction, which might very well be the most powerful force most of us will ever experience.

For one thing, there's a chance that enough plutonium could congregate to trigger a nuclear chain reaction, or criticality — the self - sustaining cascade of atomic fission that releases massive amounts of energy.

In December 1942 Enrico Fermi achieved the first self - sustaining nuclear chain reaction, harnessing the process that would be used to lay waste to the Japanese cities of Nagasaki and Hiroshima in August 1945.

On 2 December 1942, some of the world's leading scientists crowded into a disused squash court to stage the first controlled nuclear chain reaction

A student of Enrico Fermi, Fano played a central role in the early development of modern atomic physics, carrying out the first controlled nuclear chain reaction in 1942.

The reactor in an ADS contains too little fissile material in its core to sustain a nuclear chain reaction.

Like a story by Victor Hugo as told to Neil Simon, the events leading up to the first controlled nuclear chain reaction involved accidental encounters among larger - than - life figures, especially two who did not exactly get along — but had to

In certain circumstances it might be possible to set up a nuclear chain reaction, liberate energy on an industrial scale, and construct atomic bombs.»

«Subsequently, because of his conviction that if a nuclear chain reaction could be made to work it might be used as an instrument of war to set up violent explosions, Szilard separated that part of the application which related to the nuclear chain reaction and incorporated it in modified form into a later filed application, No. 19157, which he assigned to the British Admiralty in order to prevent its publication.

So Einstein realized just how special the nuclear chain reaction and the release of the energy in an atom would be.

They went out and they explained to Einstein that «There is this incredible concept which we've tested which is a nuclear chain reaction.

Having this now certified, Szilard was really scared of what would happen with a nuclear chain reaction in the wrong hands.

So Fermi went back to Columbia and reported, «There's just no interest in this at all,» which only drove Szilard to be madder and more determined to find ways to understand the nuclear chain reaction.

We invented the Twinkie and started the first nuclear chain reaction.

Commissioned to commemorate the 25th anniversary of the first controlled nuclear chain reaction.

The second biggest was Kerry Mullis» discovery of PCR, the cell - multiplying miracle that was the biological equivalent of a nuclear chain reaction.

http://www.nature.com/nature/journal/v443/n7107/abs/nature05040.html, temperature / pressure relationship for gases, ping pong balls on mouse traps aka nuclear chain reaction, etc..

Not exact matches

Should the earth and all its resident populations be devoured this evening by a chain reaction of nuclear holocausts, must that too be in at least partial accord with God's aim at «universal intensity of satisfaction?»

To spark a chain reaction, nuclear bomb makers need large stockpiles of particles.

At the same time, new questions have emerged, and there's still a lot to learn about the basic nuclear properties that drive the chain reaction and its impact on energy production here on Earth and elsewhere in our universe.

But it did list more than a half - dozen issues that could jeopardize the plant if it were confronted with the kind of chain reaction of unexpected and unplanned - for calamities that struck the Fukushima nuclear complex.

Could these conditions initiate or facilitate nuclear fusion, as suggested in the recent movie «Chain Reaction»?

Fermi, despite being an immigrant, was put in charge of constructing an «atomic pile» (nowadays nuclear reactor) to verify the chain reaction theory.

«In order to spread nuclear technologies, you have to have the people who have the expertise in nuclear engineering, who know about nuclear materials and chain reactions and things like that — the same expertise for nuclear bombs.

x-rays and nuclear materials and chain reactions, OH MY!

Pound for pound, nuclear explosives — which derive their power from runaway chain reactions in their radioactive fuel — carry about a million times the energy density of chemical explosives.

The samples were then analyzed with a technique called polymerase chain reaction (PCR), used to amplify specific nuclear «microsatellites» for statistically measuring gene flow between the different populations and subpopulations located in the western South Atlantic (Breeding Stock A) and the eastern South Atlantic and Indian Ocean populations (Breeding Stocks B and C, and the Arabian Sea humpback whale population, respectively).

But Neile Miller, who was then the acting head of the National Nuclear Security Administration in Washington, says those experts specifically told her that Los Alamos didn't have enough personnel who knew how to handle plutonium so it didn't accidentally go «critical» and start an uncontrolled chain reaction.

Unfortunately, it also has an active seismic zone beneath the PF - 4 building, producing persistent worries among the staff and members of the Defense Nuclear Facilities Safety Board, a congressionally - chartered oversight group, that if it experienced a rare, large earthquake, the roof could collapse and toss chunks of plutonium so closely together a chain reaction would ensue, spewing radioactive, cancer - causing plutonium particles throughout nearby residential communities.

Control rods will drop down into the reactor core if necessary to stop the nuclear fission chain reaction directly (see also Question 6).

In order to get nuclear fuel as close together as possible, to make the chain reaction easy, hexagons are the obvious choice.

Nuclear reactors need to cool fuel as they undergoes the fission chain reaction.

Keywords: Chromatography, Cloning, Electrophoresis, Filtration, Gas chromatography, Gel electrophoresis, High performance liquid chromatography, Microarray Analysis, Nuclear magnetic resonance spectroscopy, PAGE, Polymerase chain reaction, Polymerase chain reaction - quantitative, Purification, Reversed - phase chromatography, Separation, Sequencing, Solvents

To illustrate chain reactions in nuclear fission, a table filled with mousetraps represents the atoms and pingpong balls stand in for the new neutrons created from the split.

Content includes description of background radiation, description and animation of nuclear fission and diagram explaining how this leads to a chain reaction.

Strategically combining Fusion Blocks into massive structures then linking the blocks to a string of like - colored Energy Orbs will ignite a chain reaction of nuclear proportions and super scores.

While nuclear energy is regarded as the lesser of the two evils when compared at an emission level to the burning of fossil - fuels, it may trump on the containment of the heat process, which burns in a contained nuclear reactor through an in - ward heat - chemical reaction called fission, but nuclear energy production is a chain from uranium mining to the toxic waste disposal and therefore as an entire process is an equally high risk environmental option.