Most of the various models of the Shinkansen, Japan's high-speed trains, travel between 240 km/h and 285 km/h. The two exceptions are the Shinkansen "0" series, which began service in 1964, and the new "500" series, which began service in 1997. Series-0 trains travel up to 61.1 m/s and have a total mass of about 8.84 × 105 kg. The lightweight, streamlined series-500 trains travel up to 88.9 m/s and have an estimated total mass of about 4.80 × 105 kg. What are the maximum kinetic energies of these two trains?