A large computer system is used to control a piece of critical infrastructure. The computer consumes 12kW of power. In order to maintain continuous electrical power to the computer, a flywheel system is used to provide power in the event of a blackout. The flywheel consists of a solid disk of mass 1700kg, radius 0.7 metres, spinning at 19,500 revolutions per minute.

If the power fails, for how long can the flywheel system keep the computer system running? [Units: hours]