Sentences with phrase «for nuclear reactions»

Eventually the hydrogen gas gets dense and hot enough for nuclear reactions to start.

They are supposed to be stars that contain insufficient mass for nuclear reactions to ignite in their cores.

The agreement was that if North Korea (and others) joined, they would be given access to peaceful uses for nuclear reactions (see here).

Not exact matches

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.

For you or I to take photos of an atomic reaction and then write a book about nuclear physics would be stupid.

For instead of foresight and planning, there is only reaction, and the great problem is that it is never possible to know in advance when it will be too late to react to a calamitous environmental change — especially in a nuclear age!

Is this action / reaction model the most accurate, or are there other, regional, domestic or country - specific reasons for why a «nuclear have - not» might choose to go nuclear?

Understanding this instability is key to some experimental nuclear fusion reactions but it has never been observed for high - frequency radio waves.

For instance, they were involved in debunking cold fusion in 1991, which was a hypothetical nuclear reaction that could occur around room temperature.

A new option for powering the sun appeared in the 1930s when physicists began to understand the energy released in nuclear reactions.

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.

IF THE force of gravity were a few per cent weaker, it would not squeeze and heat the centre of the sun enough to ignite the nuclear reactions that generate the sunlight necessary for life on Earth.

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.

For decades scientists have sought to generate clean energy by instigating the kind of sustained nuclear fusion reactions that power the sun.

When the reactor malfunctions or when operators need to shut off the reactor for any other reason technicians can remotely plunge control rods into the reactor core to soak up neutrons and shut down the nuclear reaction.

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.

They are created in nuclear reactions, for example, in the sun, in stars.

DENVER — Ecosystems kilometers underground seem to thrive on food made via nuclear reactions, according to research presented here 14 February at the meeting of the American Association for the Advancement of Science, which publishes ScienceNOW.

«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.

Because of the harsh environment fuel rods are exposed to — heat, steam, and neutrons that emanate from nuclear reactions — extensive further testing will be needed on any new cladding for use in commercial reactors, Kazimi says.

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.

Hydrodynamic shock code simulations supported the observed data and indicated highly compressed, hot (106 to 107 kelvin) bubble implosion conditions, as required for nuclear fusion reactions.

This was the reaction of Len Green, a spokesman for Nuclear Electric, to accusations that the company's nearly completed Sizewell B pressurised water reactor in Suffolk has a flaw that increases the likelihood of a meltdown.

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).

A succession of mishaps and a scandal over an attempt to cover up an accident have kept the facility shut down for all but a few months since it first achieved criticality, or a sustained nuclear reaction, in 1994.

A microscopic method for simulating quantum mechanical, nuclear tunneling effects in biological electron transfer reactions is presented and applied to several electron transfer steps in photosynthetic bacterial reaction centers.

The electronlike particles called muons can catalyze nuclear fusion reactions, eliminating the need for powerful lasers or high - temperature plasmas.

A similar chemical reaction stemming from the sloppy disposal of Los Alamos» nuclear waste in 2014 provoked the shutdown of a deep - underground storage site in New Mexico for more than two years, a DOE accident investigation concluded.

An American research team in January discovered a way to initiate nuclear fusion reactions in a process called «fast ignition» by using a high - intensity laser, according to the American Association for the Advancement of Science.

As the star dies, the nuclear fusion reactions stop because the fuel for these reactions gets used up.

In the catastrophic events leading to a supernova explosion and for roughly 1,000 seconds thereafter, a great variety of nuclear reactions can take place.

And compared to the byproducts of nuclear plants, which remain radioactive for thousands of years, the small amount of radioactive material produced in fusion reactions would remain radioactive for tens of years, Synakowski said.

Nuclear reactions at the core of stars provides enough energy to make them shine brightly for many years.

For commercial use, 192Ir is produced in a nuclear reactor by reaction of 191Ir with neutrons.

For many years the number of solar electron neutrinos detected on Earth was only a third of the number expected, according to theories describing the nuclear reactions in the Sun.

This material has been enriched by nuclear reactions deep within the star and includes many of the elements necessary for forming rocky planets like our Earth, such as silicon and magnesium, and which are also the basis for life.

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.

If students reveal in an interest inventory that they enjoy working with digital media, leverage that interest in a science class by using new media to build content literacy — for example, what about Einstein's greatest hits playlist, a digital story about nuclear fusion, a video game that simulates a chemical reaction, or a web page that illustrates the formation of the earth?

Nuclear Reactions (Grades 11 - 12) >> Nike Missile Site This program will usher your high school students through the gates of a Cold War - era restored Nike Missile site that reflects a pivotal period in U.S. history with resounding implications for today.

For example — when I took physics four decades ago, the environment around an atom wasn't mentioned as affecting nuclear decay (heck, the physical / microwave environment around molecules wasn't discussed as affecting chemical reactions)

I asked the Nuclear Regulatory Commission to provide some details on what's been found, and then asked for a reaction from David A. Lochbaum, director of the Nuclear Safety Project at the Union of Concerned Scientists.

As long as the chemical and physical (and nuclear, etc.) reactions that do occur are occuring slowly enough for energy to be redistributed among particles, LTE can be approximately maintained.

My idea of a thriller novel, with at least the plot potential of State Of Fear, has for years been a group of rogue scientists who drill down to near the magma of a volcano on a remote Indonesian island and drop a nuclear bomb down there to break things loose and start a real volcanic reaction — leaving us with lots of sulfates in the atmosphere.

Mark has already been called a chernobyl death denier by greens, for thinking nuclear is a good option, ie reduce coal CO2 emission build nuclear and has been critical of the reaction over Japan (ie Germany to close ALL nuclear down)

Is there a need for a greenhouse gas effect when none of the Energy balances issued from 1824 to the present include the «heat of the earth itself» There is a layer of molten material below the surface of the earth (probable keep hot by nuclear materials reactions) that CAN ACCOUNT FOR MUCH OF THE EARTHS CONTINUING TEMPERATURE WHEN ADDED TO THE SOLAR ENERGY INPUT FROM THE Sfor a greenhouse gas effect when none of the Energy balances issued from 1824 to the present include the «heat of the earth itself» There is a layer of molten material below the surface of the earth (probable keep hot by nuclear materials reactions) that CAN ACCOUNT FOR MUCH OF THE EARTHS CONTINUING TEMPERATURE WHEN ADDED TO THE SOLAR ENERGY INPUT FROM THE SFOR MUCH OF THE EARTHS CONTINUING TEMPERATURE WHEN ADDED TO THE SOLAR ENERGY INPUT FROM THE SUN.

Given the evident concern about nuclear waste, it will be interesting to see if there is any reactions from young people to the governments recent admission that, on current NDA plans, the proposed Geological Disposal Facility (GDF) is not expected to be available to take spent fuel from new nuclear power stations until around 2130, which they note «is approximately 50 years after the likely end of electricity generation for the first new nuclear power station».

2011 Reaction to nuclear reactor disaster at Fukushima (Japan) ends hopes for a renaissance of nuclear power.

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..

If the injury leading to death occurred while the deceased was in the process of working on or repairing a car; doing certain commercial work or work for charge as defined in the specifics of the mandatory car insurance policy; died as a result of suicide, died as a result of war, nuclear reaction, or contamination; died as a result of being struck by a railroad car or a farm tractor; or died as a result of injuries sustained while racing, there is generally no coverage on these types of policies.