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We wouldn't normally answer what is blatantly a homework problem, however I think there is an important principle here and it's instructive to go into detail. Any experimental physicist will tell you that when faced with experimental data the very first thing to do is DRAW A GRAPH: The blue squares are your data and the red line is a fit (see below). ...


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P1 - They WERE used on land, extensively. Note on land the horizon is indeterminate as hills and valleys are present. A still pool of water (aka artificial horizon) is known to perfectly parallel to the true horizon and accurate measurements can be made. (Compare the direct image of the Sun to its reflected image and note the angle between the two.) P2 - ...


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I strongly suggest You research Einstein's brilliant insight in "The Principal of Equivalence". You will begin to see that what we think of as a "force" or hypothetical "graviton" as a carrier of force is not valid. An accelerating field= gravity. No "pull". No force. Seems hard to grasp, because it is. 'might try and get "Gravity Revealed" by Ronald ...


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Addressing the second part: There are really two different aspects here: the navy and the army. For the navy, it basically boils down to one thing: after WWII, radar got a lot better a lot faster, and quite quickly began to outperform the optical systems. The big benefit is not intrinsic range precision, but the ability to work in all weathers. For the ...



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