(i) 5ms-2=5(10-3km)(160×60h)-2 =5×10-3×3600×3600kmh-2 =6.480×104kmh-2 (ii) G=6.67×1011Nm2kg-2 =6.67×10-11(kgms-2)m2kg-2 =6.67×10-11m3s-2kg-1
確定! 回上一頁