Amtraks newer system, from New York to Boston, is 60 cycle 25,000 volts. The system south of New York is 25 cycle 13,000 volts.
amtrak is a company that owns trains. most amtrak trains are diesel but in the north east (NY, Penn, NH MD, CT, DC, etc) there is catenary for electric trains so amtrak is both diesel and electric. Answer: I live in NJ and I take Amtrak to the south. So from NJ to Washingto, DC it runs electric. Once in DC, they announce that the train will be switching over to diesel.
Some, like the Acela Express do, but most others don't. Most of the ones that do are on the east coast. I live on the East Coast and I take Amtrak from New Jersey to the South. From New Jersey to Washington, DC Amtrak runs on electricity. In DC, Amtrak switches over to diesel to continue South.
Catenary
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The general formula of a catenary is y = a*cosh(x/a) = a/2*(ex/a + e-x/a) cosh is the hyperbolic cosine function
A equation is santa clause
sphere
The Catenary and Parabola are different curves that look similar; they are both "U" shaped and symmetrical, increasing infinitely on both sides to a minimum.
A catenary is the curve formed by slack wire - telephone cables are a good example. So a catenary tow is one where, simply put, the towline is attached to shackles of anchor cable in order to ensure that a belly of towline (providing spring) hangs between the two ships.
If: A=Horizontal distance betwen ends (at same height) B=Depth of catenary C=radius of curvature at lowest point L=length along catenary M=Mass per unit length Tm=Tension at ends of catenary To=Tension at lowest point. (Also horizontal component of tension at any point) Then: C=To/M, and B=C(cosh(A/2C)-1)
amtrak .com
At the amtrak station.