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Earth continuity

It is interesting to note that recent evidence shows that even extra-terrestrially formed hydrocarbons can reach the Earth. The Earth continues to receive some 40,000 tons of interplanetary dust every year. Mass-spectrometric analysis has revealed the presence of hydrocarbons attached to these dust particles, including polycyclic aromatics such as phenanthrene, chrysene, pyrene, benzopyrene, and pentacene of extraterrestrial origin indicated by anomalous isotopic ratios. [Pg.128]

Blow out motor windings, lubricate as necessary. Check insulation resistance and test earth continuity. [Pg.793]

Earth continuity is satisfactory (for example connections are tight and conductors are of sufficient cross-section) X ... [Pg.476]

Hardware tests earth continuity, high voltage tests... [Pg.613]

Newton s God, like the Calvinist God, rules the earth continually. Nothing happens out of necessity, but out of God s free will. God created the world as He pleased, He designed the framework and he presides over it actively as well. Newton wrote ... [Pg.121]

So when does the first evidence of improbable, information-containing, metabolic replication occur in the fossil record The Earth is 4,500 million years old, as judged by several corroborating radionuclide studies of the oldest rocks on the planet show. Meteoric bombardment of the proto-Earth continued heavily until 4,000 MY A, probably precluding life during this period. The majority of the oldest rocks on Earth are 3,500 million years old, and the earliest microfossils are from 3,000+ MYA, hence we only have a window of about 500 million years from the end of the meteoric bombardment to the first signs of microbial life. This means we are either very lucky, or life is a high-on certainty ... [Pg.1]

Here is how the method works. High-energy neutrons resulting from cosmic ray collisions reach Earth continually from outer space. They enter the atmosphere and cause the slow formation of by bombarding ordinary atoms ... [Pg.773]

As the human population of the earth continues to grow and the resulting crisis in world food supplies becomes more critical, utilization of wood cellulose and cellulosic waste materials as sources of food for animals or even for human consumption may become imperative. Food processors already are experimenting with fermentation methods and treatments with cellulolytic enzymes as means to increase the nutritive value of wood and other refractory food materials or waste products. It is conceivable that cellulolytic enzymes produced in microbiological cultures could be ingested by man or other animals together with foods... [Pg.161]

A key factor in the design and choice of earth continuity conductors, e.g. cable armouring, bonding straps, and fault current protective devices is the earth loop impedance . This is especially the case for solidly earthed low voltage systems, whether they be three-phase, single-phase or even direct current systems. [Pg.365]

There are a few scientific ways to roughly calculate the age of the earth. Continuous, measurable chemical processes provide one way. If the rate of the process and current amount of the product can be determined, then it is possible to put a time on when the process started. The most obvious flaw in this method of reckoning is that the resultant product might not aU be due to the single process being measured. What it does show us, though, is that the beginning date of the process can be no earlier than the date deduced. Here s an example ... [Pg.11]

Different constellations appear as the earth continues its revolution around the sun with the seasonable changes. [Pg.112]

MASS, DIMENSIONS, AND OTHER PARAMETERS OF THE EARTH (continued)... [Pg.2208]

Because of inertia, after the explosion shock waves leave the explosion zone, the earth continues to leave from the explosive places and lasts some time. It induces the negative pressure of explosion zone, and the transportation of sparse waves. [Pg.84]

The trunking installation must be treated as an exposed conductive part and be properly earthed in accordance with Regulation 411.3.1.1. Care must be taken to provide reliable earth continuity and an adequate earth fault current path by making all joints electrically and mechanically secure. [Pg.222]

The cable is terminated with a simple gland which compresses a compression ring onto the steel wire armouring to provide the earth continuity between the switchgear and the cable. [Pg.228]

It is particularly important to check that the plug tops and cables of handheld electrically powered tools and extension leads are in good condition. Damaged plug tops and cables must be repaired before you use them. All electrical power tools of 110 V and 230V must be inspected and tested with a portable appliance tester (PAT) in accordance with the company s procedures, but probably at least once each year. PAT testing tests the quality of the insulation resistance and the earth continuity. Inspection checks the condition of the plug top, fuse and lead. [Pg.286]

Some faults, such as the loss of earth continuity due to wires breaking or loosening within the equipment, the breakdown of Insulation and Internal contamination (for example, dust containing metal particles may cause short circuiting If It gets Inside the tool), will not be spotted by visual Inspections. To Identify these problems, a programme of testing and Inspection will be necessary. [Pg.249]

But better things were in store for Earth and its solar system siblings Mars and Venus. Earth continued to move, grow, and develop until a small museum could be opened in Montreal with glass cases of minerals, including old rocks like what... [Pg.57]

Lead-covered wiring was superseded by the tough-rubber-sheathed (TRS) system where the VRI conductors were contained in a tough rubber sheath with an uninsulated protective conductor. This solved the earth continuity problem but the wiring became a fire hazard when the rubber perished. After World War II, PVC was introduced and replaced the rubber for both insulation and sheath and, apart from some teething troubles in its early years, it is now satisfactory and appears to have a very long life. As it burns less readily than rubber it is a lesser fire hazard. [Pg.21]


See other pages where Earth continuity is mentioned: [Pg.148]    [Pg.159]    [Pg.108]    [Pg.190]    [Pg.187]    [Pg.9]    [Pg.417]    [Pg.72]    [Pg.61]    [Pg.411]    [Pg.323]    [Pg.136]    [Pg.222]    [Pg.255]    [Pg.315]    [Pg.159]    [Pg.323]    [Pg.358]    [Pg.20]    [Pg.232]    [Pg.633]    [Pg.784]    [Pg.244]    [Pg.20]    [Pg.100]   
See also in sourсe #XX -- [ Pg.100 , Pg.115 , Pg.143 , Pg.152 , Pg.153 , Pg.328 ]




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