Answer:
Dubbed “El Capitan,” the supercomputer is part of the Exascale Computing Project, a DOE effort to increase computing power so that the department can run highly advanced simulations and modelling of the United States' nuclear arsenal. These simulations help alleviate the need for underground testing.
 
        
             
        
        
        
Answer:
C. ground antennas 
Explanation:
AKA Satellite Dishes That Communicate Just Like Direct Tv dish It is focused by a bowl-shaped parabolic dish onto a device in the center called a "feed horn", which channels the signal to a "low-noise block down converter" (LNB) which filters out unwanted interference, and sometimes converts it to yet another frequency before amplifying it and sending it to the satellite receiver
 
        
             
        
        
        
The command is Merge & Center
This command could be easily found in the toolbar of your excel.
If you execute this command in two different cells, those cells will be merged into one larger cell and the content in that cells will be placed exactly in the middle of the combined cell (measures according to combined cells' length)