A Propelling Control Vehicle ( PCV ) is a type of British railway carriage for carrying mail.

The provincial committee party and government are presently drafting the " Opinions on Propelling China Scientific City Construction " report which is expected to come out soon.

Propelling charges for tube artillery can be provided in one of two ways: either as cartridge bags or in metal cartridge cases.

In 1936, while working for Pohl, von Ohain earned a patent on his version of jet engines, Process and Apparatus for Producing Airstreams for Propelling Airplanes.

Propelling idea of " non-plot " within Einstein on the Beach, its libretto employs solfège syllables, numbers, and short sections of poetry.

Propelling a Trikke uphill requires substantially more effort and effective movement, but can be mastered with experience.

They were converted into Propelling Control Vehicles ( PCV ) and used as a kind of driving trailer car at the end of locomotive-hauled parcels trains.

Propelling nozzles can be subsonic, sonic, or supersonic.

Propelling nozzles can be fixed geometry, or they can have variable geometry, to give different throat and exit diameters so as to deal with differences in ambient pressure, flow and engine pressure ; thus permitting improvement of thrust and efficiency.

Rail Express Systems livery as carried by Propelling Control Vehicle no.

It also allows a Class 90 to work a push-pull passenger train with a Driving Van Trailer ( DVT ), DBSO or Propelling Control Vehicle.

That much of what he calls folklore is the result of beliefs carefully sown among the people with the conscious aim of producing a desired mass emotional reaction to a particular situation or set of situations is irrelevant.

He showed that, although matter can change its state in a chemical reaction, the total mass of matter is the same at the end as at the beginning of every chemical change.

However, the law of mass action is valid only for concerted one-step reactions that proceed through a single transition state and is not valid in general because rate equations do not, in general, follow the stoichiometry of the reaction as Guldberg and Waage had proposed ( see, for example, nucleophilic aliphatic substitution by S < sub > N </ sub > 1 or reaction of hydrogen and bromine to form hydrogen bromide ).

All known isotopes of curium are radioactive and have a small critical mass for a sustained nuclear chain reaction.

The velocity with which the reaction process propagates in the mass of the explosive.

reaction mass that they can keep firing continuously for days or weeks, while chemical rockets use up reaction mass so quickly that they can only fire for seconds or minutes.

Another fairly detailed vehicle system, designed and optimized for crewed Solar System exploration, " Discovery II ", based on the D < sup > 3 </ sup > He reaction but using hydrogen as reaction mass, has been described by a team from NASA's Glenn Research Center.

* Nuclear thermal rockets or Solar thermal rockets could use it as reaction mass.

Hydrogen has also been proposed for use in these engines and would provide much greater specific impulse ( thrust per kilogram of reaction mass ), but it has been claimed that water will beat hydrogen in cost / performance terms despite its much lower specific impulse by orders of magnitude.

The total rest masses of the fission products ( Mp ) from a single reaction is less than the mass of the original fuel nucleus ( M ).

An assembly that supports a sustained nuclear chain reaction is called a critical assembly or, if the assembly is almost entirely made of a nuclear fuel, a critical mass.

The word " critical " refers to a cusp in the behavior of the differential equation that governs the number of free neutrons present in the fuel: if less than a critical mass is present, then the amount of neutrons is determined by radioactive decay, but if a critical mass or more is present, then the amount of neutrons is controlled instead by the physics of the chain reaction.

Nuclear fission weapons must use an extremely high quality, highly-enriched fuel exceeding the critical size and geometry ( critical mass ) in order to obtain an explosive chain reaction.

This energy ( in the form of radiation and heat ) carries the missing mass, when it leaves the reaction system ( total mass, like total energy, is always conserved ).

* Nuclear fission reactors produce heat through a controlled nuclear chain reaction in a critical mass of fissile material.

At 18: 59 on 13th July, 1954, the reactor reached critical mass and sustained Sweden's first nuclear reaction.

Solar neutrinos have energies smaller than the mass of muons and tau leptons, so only electron neutrinos can participate in this reaction.

For gases, the volume ratio is ideally the same by the ideal gas law, but the mass ratio of a single reaction has to be calculated from the molecular masses of the reactants and products.

One advantage of magnetic or solar sails over ( chemical or ion ) reaction thrusters is that no reaction mass is depleted or carried in the craft.

The protons and electrons which make up the solar wind are deflected by this magnetosphere and the reaction accelerates the spacecraft.

# A photodiode or solar cell may be considered as a source of emf, similar to a battery, resulting in an electrical voltage generated by charge separation driven by light rather than chemical reaction.

This hygroscopic property coupled with an inherent exothermic ( heat-producing ) reaction when transitioning from a dehydrated to a hydrated form make natural zeolites useful in harvesting waste heat and solar heat energy.

Other hardware components were supplied as follows: the beam-combining mirror from REOSC at Saint Pierre du Perray ; the spherical, folding and relay mirrors from Carl Zeiss AG in Oberkochen ; the external straylight baffles from CASA in Madrid ; the modulating grid from CSEM in Neuchatel ; the mechanism control system and the thermal control electronics from Dornier Satellite Systems in Friedrichshafen ; optical filters, the experiment structures and the attitude and orbit control system from Matra Marconi Space in Velizy ; instrument switching mechanisms from Oerlikon-Contraves in Zurich ; the image dissector tube and photomultiplier detectors assembled by the Dutch Space Research Organisation, SRON in The Netherlands ; the refocusing assembly mechanism designed by TNO-TPD in Delft ; the electrical power subsystem from British Aerospace in Bristol ; the structure and reaction control system from Daimler-Benz Aerospace in Bremen ; the solar arrays and thermal control system from Fokker Space System in Leiden ; the data handling and telecommunications system from Saab Ericsson Space in Gothenburg ; and the apogee boost motor from SEP in France.

A lightcraft is distinct from a solar sail because it is dependent on the expansion of reaction mass to accelerate rather than being accelerated by light pressure alone.

A solar thermal rocket is a theoretical spacecraft propulsion system that would make use of solar power to directly heat reaction mass, and therefore would not require an electrical generator like most other forms of solar-powered propulsion do.

Mission highlights included: the first use of a space based laser for environmental research ; deployment and retrieval of a spacecraft in support of solar wind and corona studies ; robotic processing of semiconductors ; maneuvered the robotic arm in proximity to over 100 Shuttle reaction control system jet firings to measure forces imparted to a plume detection instrument in support of future Space Station / Shuttle rendezvous flights ; first untethered spacewalk in 10 years to test a self-rescue jetpack.

Other activities included the first use of lasers for environmental research, deployment and retrieval of a solar science satellite, and the performance of plume characterization studies of the reaction control thruster exhaust.

During the first of these spacewalks, Newman and Massimino replaced an old solar array and a reaction wheel assembly with new units.

The detectors that use gallium are most sensitive to the solar neutrinos produced by the proton-proton chain reaction process.

This reaction occurs quite quickly compared to the time that it takes for the injected electron to recombine with the oxidized dye molecule, preventing this recombination reaction that would effectively short-circuit the solar cell.

: C < sub > 4 </ sub > plants like maize and sorghum can achieve a higher yield at high solar radiation intensities, because they prevent the leaking of captured carbon dioxide due of the spatial separation of carbon dioxide capture and carbon dioxide use in the dark reaction.

This reaction has been proposed to store solar energy.