Is creton a Scrabble word?
Is creton a Scrabble word?
CRETON is not a valid scrabble word.
What does trajectory mean?
1 : the curve that a body (such as a planet or comet in its orbit or a rocket) describes in space. 2 : a path, progression, or line of development resembling a physical trajectory an upward career trajectory.
What does seismic mean?
1 : of, subject to, or caused by an earthquake also : of or relating to an earth vibration caused by something else (such as an explosion or the impact of a meteorite) 2 : of or relating to a vibration on a celestial body (such as the moon) comparable to a seismic event on earth.
How do you spell creton?
cretin
- 1offensive A stupid person (used as a general term of abuse). idiot, halfwit, nincompoop, blockhead, buffoon, dunce, dolt, ignoramus, cretin, imbecile, dullard, moron, simpleton, clod.
- 2Medicine. dated A person who is physically deformed and has a mental disability because of congenital thyroid deficiency.
What does imbecile mean?
The term imbecile was once used by psychiatrists to denote a category of people with moderate to severe intellectual disability, as well as a type of criminal. The word arises from the Latin word imbecillus, meaning weak, or weak-minded. The meaning was further refined into mental and moral imbecility.
How does an earthquake start?
An earthquake is caused by a sudden slip on a fault. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth’s crust and cause the shaking that we feel. In California there are two plates – the Pacific Plate and the North American Plate.
What is seismic used for?
Seismic surveys use reflected sound waves to produce a “CAT scan” of the Earth’s subsurface. Seismic surveys can help locate ground water, are used to investigate locations for landfills, and characterize how an area will shake during an earthquake, but they are primarily used for oil and gas exploration.
How does seismic reflection work?
The general principle of seismic reflection is to send elastic waves (using an energy source such as dynamite explosion or Vibroseis) into the Earth, where each layer within the Earth reflects a portion of the wave’s energy back and allows the rest to refract through.
How do seismographs work?
Seismographs record seismic waves. They contain a weight and a pen attached to a spring (below). The seismograph is bolted to the ground so during an earthquake it moves with the ground, whilst the weight and pen remain still. The pen moves across a rotating paper roll recording the seismic waves.
What is seismic work?
As the name suggests, seismic examines surface-induced seismic pulses to image subsurface formations. Basically, a seismic wave is generated underneath the earth’s surface, and then picked up by sensors called “geophones” as the waves bounce off subsurface formations – that is, layers of rock beneath the surface.
How loud is a seismic air gun?
Seismic surveys utilize arrays of airguns to produce powerful sound waves. There is a difference of about 60 dB when converting the sound level from water to air, so in air, the airgun sound level would be about 140 to 180 dB.
How do geophones work?
A geophone is a device that converts ground movement (velocity) into voltage, which may be recorded at a recording station. The deviation of this measured voltage from the base line is called the seismic response and is analyzed for structure of the earth.
What is seismic drilling?
Seismic drilling, also known as shot hole drilling, is drilling conducted as part of a seismic survey of a geologic formation. After sinking a hole, the members of the team can mount explosives inside.
What is seismic testing in the ocean?
Seismic testing involves blasting the seafloor with high-powered airguns (a kind of powerful horn) every 10 seconds and measuring the echoes with long tubes to map offshore oil and gas reserves. These blasts disturb, injure and kill marine wildlife around the clock for years on end.
What is a seismic air gun used for?
Seismic airguns are used to find oil and gas deep underneath the ocean floor.
How much does a seismic survey cost?
The cost of acquisition depends on permit costs, crew costs, and other equipment costs. Currently, it costs around $75,000 per square mile to acquire 3D seismic data. The Oil and Gas Company that requests the acquisition spends at least $1M, and possibly over $40M, before they see any of the results.
What is 3D seismic survey?
In three-dimensional (3D) reflection seismic surveying the sound detectors (numbering up to a thousand or more) are spread out over an area and the sound source is moved from location to location through the area. 3D seismic programs are generally a uniform and evenly spaced grid of lines.
What is seismic survey in oil and gas?
Seismic survey is a method used during the exploration phase of oil and gas development. The method gives a first idea of what is present underneath the earth’s surface.
What is 4D seismic survey?
4D (3D-Time Lapse) Seismic Surveys 4D seismic survey is a three-dimensional (3D) seismic data acquired at different times over the same area to assess changes in a producing hydrocarbon reservoir with time. Changes may be observed in fluid movement and saturation, pressure, and temperature.
What is a vibroseis truck?
A seismic vibrator is a truck-mounted or buggy-mounted device that is capable of injecting low-frequency vibrations into the earth. Today, seismic vibrators are used to perform about half of all seismic surveys on land.
What is gravity survey?
A gravity survey, whether conducted at the surface or along a borehole, involves measuring acceleration due to gravity at different points (this is invariably given the symbol g).
How gravity is measured?
Gravity is measured by the acceleration that it gives to freely falling objects. Thus, for every second an object is in free fall, its speed increases by about 9.8 metres per second. At the surface of the Moon the acceleration of a freely falling body is about 1.6 metres per second per second.
What are the two main types of Gravimeters?
There are two types of gravimeters: absolute and relative. Absolute gravimeters measure the local gravity in absolute units (Gal). Absolute gravimeters are compact (Autograv CG-5 model) and used in the field. They work by directly measuring the acceleration of a mass during freefall in a vacuum.
What causes gravity anomalies?
Gravity anomalies are often due to unusual concentrations of mass in a region. Conversely, the presence of ocean trenches or even the depression of the landmass that was caused by the presence of glaciers millennia ago can cause negative gravity anomalies.
What are examples of anomalies?
The definition of anomalies are people or things that are abnormal or stray from the usual method or arrangement. Proteus Syndrome, skin overgrowth and unusual bone development, and Hutchinson-Gilford Progeria Syndrome, the rapid appearance of aging in childhood, are both examples of medical anomalies.
What do you mean by gravity anomaly?
A gravity anomaly is the difference between the observed acceleration of an object in free fall (gravity) on a planet’s surface, and the corresponding value predicted from a model of the planet’s gravitational field. These anomalies are thus of substantial geophysical and geological interest.
Where is gravity the heaviest on earth?
Arctic Ocean
Is Earth losing its gravity?
According to some calculations, the Earth is losing 50,000 metric tons of mass every single year, even though an extra 40,000 metric tons of space dust converge onto the Earth’s gravity well, it’s still losing weight.
Can Earth lose its gravity?
A lack of gravity would eventually take its toll on our very planet, writes Masters. “Earth itself would most likely break apart into chunks and float off into space.” Without the force of gravity to hold it together, the intense pressures at its core would cause it to burst open in a titanic explosion.
Is gravity the strongest force?
Actually, gravity is the weakest of the four fundamental forces. Ordered from strongest to weakest, the forces are 1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity.