[填空题]
A figure skater can increase hero nrf+e.88tf1q le wc. spin rotation rate from an initial rkxq8a-l8n(- q r6 sh stdh0/giate of 1.0 rev every 2.0 s to a final rate of 3 80 --gaih(xtss l k qrq/dnh68$rev/s$ If her initial moment of inertia was 4.6 kg*$m^2$ what is her final moment of inertia? How does she physically accomplish this change? $kg \cdot m^2$