Functions of mitochondria depends on the cell type in which they are present. The most important function of the mitochondria is to produce energy. The simpler molecules of nutrition are sent to the mitochondria to be processed and to produce charged molecules.
Shanghai Maglev, also known as Shanghai Transrapid, is currently the fastest train in the world. CRH 380A running between Beijing and Shanghai, was manufactured by CSR Qingdao Sifang Locomotive & Rolling Stock. AGV Italo, touted to be the most modern train in Europe, has a maximum operational speed of 360kmph.
The Amtrak website will give you exact timings and prices. The fastest train in the USA is the Acela. It operates on theNorth-east corridor between Boston, New York, Philadelphia and Washington DC. It is capable of reaching speeds of 150mph but I believe there are only a few places where it is permitted to travel that fast.