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yes, the ability of light to travel through the cable is what makes it useful. There is not some sort of hole in the center of the cable, it is a solid glass cable.
The term core represents each individual conductor within a cable, and a pair is two cores (or two conductors) within a cable. For example if you have a 3 core cable, then the cable has 3 separate conductors in it (3 separate cables within the PVC coating). A 3 pair cable would be 3 sets of 2 cores, so this would have 6 conductors within the cable.
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No, a rotating masonry drill bit adjacent to a cable will not create a magnetic field and no it could not disrupt the electrical current within the cable .
100m
* It depends on how it is travelling. * * An electromagnetic wave, e.g a radio wave would travel about 7,000 feet * * Electricity travelling down a cable would travel at the speed of light multiplied by the velocity factor of the cable. In an averagely good co-axial cable with a velocity factor of 0.8 electricity would travel approximately 5600 feet in 7 microseconds.
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Electricity seems to travel at about .66 of the speed of light through a normal cable. This converts to 197863022.28 miles per second. This number can change depending on the cable.
One can find information on Cable Beach on various travel websites such as Frommers and Travel Tips. Advice on where to go and stay can be found on Expedia and Trip Advisor sites.
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Spotlit with Carolyn Cable - 1999 Potential Within 1-14 was released on: USA: 5 January 2011