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There is no object that is simply called "delta". On the other hand, there are several that have delta as part of their name, usually followed by the constellation, e.g. delta orionis, delta canis maioris, etc.

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14y ago

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How do you install an earthing system for telecom?

make separate earth pits far from the electrical system earth pits and test to have low resistivity then connect the system or tower.


Why neutral is not requied in 3 phase?

As far as I understand, you don't need neutral line for connecting appliances that is 3-phase compilant. You only need the neutral line to connect a single phase appliance, which you connect along with one of the three lines.


How far - honestly - will a 200mw laser go?

As far as your eyes can see...


What are the three main problems that traveling from Earth to Mars must overcome?

1. Lack of gravity - no gravity caused bone loss and other changes in the human body. 2. Radiation - deadly radiation from the sun and cosmic rays can damage human tissue or even kill astronauts if they get overexposure to radiation for which there is little or no protection in outer space. 3. Isolation - no one has been that far from Earth before and little is known about the long term effects of being cut off from Earth and other humans.


Has technology changed people belief systems?

Yes. There are many examples but one of the most obvious, people once believed the world was flat and if you went far enough out to sea you would reach the edge. It's a myth however that people in Columbus' time thought this. Another example, more recently people thought the Earth was the center of the universe and the Sun and other planets revolved around the Earth. 500 years after Nicolaus Copernicus proved the Earth revolves around the sun, one American in four (26 percent) doesn't know or doesn't believe this.