Because of the low availability relative to demand, rhenium is among the most expensive of metals, with an average price of approximately US $ 4, 575 per kilogram ( US $ 142. 30 per troy ounce ) as of August 2011 ; it is also of critical strategic military importance, for its use in high performance military jet and rocket engines.

Because Japanese air defenses made daytime bombing below jet stream-affected altitudes too perilous, LeMay finally switched to low-altitude nighttime incendiary attacks on Japanese targets, a tactic senior commanders had been advocating for some time.

Because it was the site of the first large-scale jet-vs-jet air battles, MIG Alley is considered the birthplace of jet fighter combat.

Because of the way they work, the typical exhaust speed of jet engines is transonic or faster, therefore most jet aircraft need to fly at high speeds, either supersonic or speeds just below the speed of sound (" transonic ") so as to achieve efficient flight.

Because at every point of their path the high-velocity jets are emitting light, the light they emit does not approach the observer much more quickly than the jet itself.

Because the ceramic is so brittle the entrance channel of a shaped charge jet is not smooth — as it would be when penetrating a metal — but ragged, causing extreme asymmetric pressures which disturb the geometry of the jet, on which its penetrative capabilities are critically dependent as its mass is relatively low.

Because blue water gas lacked illuminants, it would not burn with a luminous flame in a simple fishtail gas jet as existed prior to the invention of the Welsbach mantle in the 1890s.

Because Owen Roberts International Airport does not have jet bridge service, all passengers are routed from the terminal building onto the ramp for access to the aircraft.

Because at every point of their path the high-velocity jets are emitting light, the light they emit does not approach the observer much more quickly than the jet itself.

Because of a malfunctioning emergency radio, that allowed them only to send messages and not receive them, the patrol did not realise that while trying to reach overhead allied jets, they had in fact been heard by a US jet pilot.

Because pressure cannot travel upstream through the supersonic flow, the exit pressure can be significantly below ambient pressure it exhausts into, but if it is too far below ambient, then the flow will cease to be supersonic, or the flow will separate within the expansion portion of the nozzle, forming an unstable jet that may ' flop ' around within the nozzle, possibly damaging it.

Because the molar volume of gas is much less, the jet effect is a fraction of that for compressed-gas driven shock tubes.

Because of the much higher nozzle pressure ratios experienced, rocket motor con-di nozzles have a much greater area ratio ( exit / throat ) than those fitted to jet engines.

Because of the enormous amount of energy needed to launch a relativistic jet, some jets are thought to be powered by spinning black holes.

Because of jet blast, gates and traffic lights were installed to close off the A38 road when Concorde took off.

Because thermal wind causes an increase in wind velocity with height, the westerly pattern increases in intensity up until the tropopause, creating a strong wind current known as the jet stream.

Because of the high drag associated with the transonic drag region and the low thrust of early jet aircraft, trajectory optimization was the key to maximizing climb to altitude performance.

Because the nature of the cutting stream can be easily modified the water jet can be used in nearly every industry ; there are many different materials that the water jet can cut.

Because the rotor is driven directly by jet thrust, there is no need for a tail rotor to control torque as in a conventional helicopter.

Because the high peaks function as moisture catchers, Kyrgyzstan is relatively well watered by the streams that descend from them.

Because the rivers and streams have such steep gradients and are so fast moving, they are erosive instead of depository in nature.

Because of the seasonal overflow of the numerous westward-flowing streams, the lowland areas of the Paraneña region also experience poor drainage conditions, particularly in the Ñeembucú Plain in the southwest, where an almost impervious clay subsurface prevents the absorption of excess surface water into the aquifer.

Because of the Platte's brackish water, the preferred camping spots were along one of the many fresh water streams draining into the Platte or the occasional fresh water spring found along the way.

Because there are no rivers, with the exception of a few minor streams, flowing directly into the northwest arm, Gunnison Bay, it is now substantially saltier than the rest of the lake.

Because the limestone cap is porous, rainwater quickly sinks through it and there are no permanent streams, or standing bodies of freshwater.

Because JSP focusses on the existing input and output data streams, designing a program using JSP is claimed to be more straightforward than with other structured programming methods, avoiding the leaps of intuition needed to successfully program using methods such as top-down decomposition.

Because of the abundance of powerful streams, many of the major westward rivers off the Cascades have been dammed to provide hydroelectric power.

Because of the extreme hardiness of the species, it is sometimes the only species found in severely polluted and oxygen-deprived streams, such as the Elizabeth River in Virginia, and the Hackensack River and the Arthur Kill in New Jersey during the height of the water pollution problem in the United States.

Because a systolic array usually sends and receives multiple data streams, and multiple data counters are needed to generate these data streams, it supports data parallelism.

Because of these findings, it is thought that area 19 is the differentiation point of the two visual streams, of the ' what ' and ' where ' visual pathways.

Because of this, in 1532 a Stannary Court decree ordained that all rubbish should be deposited in " old Hatches, Tipittes, miry Places, or other convenient Places " away from the main streams.

Because clown loaches come from rivers and streams, they are accustomed to having other fishes and plants in their environment.

Because Ontario divides the education system into English Public, English Catholic, French Public, and French Catholic streams, which school Embrun children attend depends on which stream they are in.

Because the house is situated in a densely populated neighborhood, tensions have arisen over the years in regard to film production crews, as well as the streams of tourists and restoration construction workers.

Because Great Prespa Lake sits about 150m above Lake Ohrid, which lies only about ( 6 miles ) to the west, its waters run through underground channels in the karst and emerge from springs which feed streams running into Lake Ohrid.

Because of the speculation involved slipstream processors are generally described as having two parallel executing streams.

Because of the protected areas on both sides of the creek and the ease of public access, this area has become one of the Catskills ' popular trout streams, and fly-fishermen can be seen here during the season.

Because individual classes of foods differ in their requirements for preservation, a number of methods have been developed over the years involving one or a combination of procedures such as dehydration, fermentation, salting, chemical treatment, canning, refrigeration, and freezing.

Because Christianity teaches not only salvation in history, but salvation by the history of Christ, such an interpretation of death would require a drastic revision of the Christian understanding of the work of Christ.

Because temperature is defined by the relationship between energy and entropy, such a system's temperature becomes negative, even though energy is being added.

Because of a change in balance, actions such as sitting, squatting, lunging or walking are often selected by the teacher.

Because the WD1770 is capable of single density mode and uses the same IBM360 derived floppy disc format as the Intel 8271 found in the BBC Micro, it was also possible to run a DFS filing system with an alternate ROM, such as the P. R. E. S AP4 interface.

Because of this keyword stropping, it was possible for AA to allow spaces in variable names, such as < code >< u > integer </ u > previous value </ code >.

Because these methods are diverse and use data from such different sources, the problem of integrating them into a coherent argument has been a long-term issue for archaeoastronomers.

Because of the medical problems that can be caused by withdrawal, alcohol detoxification is carefully controlled and may involve medications such as benzodiazepines such as diazepam ( Valium ).

Because the FLRW metric assumes a uniform distribution of mass and energy, it applies to our Universe only on large scales — local concentrations of matter such as our galaxy are gravitationally bound and as such do not experience the large-scale expansion of space.

Because of the subject matter and graphic violence of some of De Palma's films, such as Dressed to Kill, Scarface and Body Double, they are often at the center of controversy with the Motion Picture Association of America, film critics and the viewing public.

Because there are a lot of such electron pairs in a superconductor, these pairs overlap very strongly and form a highly collective condensate.

Because such strains transfer chromosomal genes very efficiently they are called Hfr ( high frequency of recombination ).

Because breasts are mostly fatty tissue, their shape can within limits be molded by clothing, such as foundation garments.

Because Broadway is a true north – south route that parallels the Hudson River and preceded the grid that the Commissioners ' Plan of 1811 imposed on the island, Broadway diagonally crosses Manhattan, its intersections with avenues marked by " squares " ( some merely triangular slivers of open space ) have induced some interesting architecture, such as the Flatiron Building.

Because he was in such demand, some places booked Wills any time he had an opening, regardless of how undesirable the date.

Because of a known vulnerability in older versions of Internet Explorer, some e-mail programs, such as Microsoft's Outlook Express and Microsoft Outlook programs, may install and execute the worm as soon as the e-mail message is viewed.

Because Chaplin was not a trained musician, he could not read notes and needed the help of professional composers, such as David Raksin, Raymond Rasch and Eric James, when creating his scores.

Because of these problems, various standardized tests, often called " benchmarks " for this purpose — such as SPECint – have been developed to attempt to measure the real effective performance in commonly used applications.

Because of the popularity of Italian opera throughout 18th-century Europe ( except France ), singers such as Ferri, Farinelli, Senesino and Pacchierotti became the first operatic superstars, earning enormous fees and hysterical public adulation.

Because his vision of personal and social perfections was framed as a revival of the ordered society of earlier times, Confucius is often considered a great proponent of conservatism, but a closer look at what he proposes often shows that he used ( and perhaps twisted ) past institutions and rites to push a new political agenda of his own: a revival of a unified royal state, whose rulers would succeed to power on the basis of their moral merits instead of lineage. These would be rulers devoted to their people, striving for personal and social perfection, and such a ruler would spread his own virtues to the people instead of imposing proper behavior with laws and rules.

Because he was proclaimed Emperor on the initiative of the Praetorian Guard instead of the Senate — the first Emperor thus proclaimed — Claudius ' repute suffered at the hands of commentators ( such as Seneca ).

Because many outstanding problems in number theory, such as Goldbach's conjecture are equivalent to solving the halting problem for special programs ( which would basically search for counter-examples and halt if one is found ), knowing enough bits of Chaitin's constant would also imply knowing the answer to these problems.

Because the act of processing results in the loss of certain vitamins and minerals ( such as magnesium ), some consider raw cacao to be a more nutritious form of chocolate.