来自单泉的问题
单位换算:2.24L=______cm3;0.9×103kg/m3=______g/cm3;200mg=______kg;168km=______nm.
单位换算:2.24L=______cm3; 0.9×103kg/m3=______g/cm3;200mg=______kg;168km=______nm.
1回答
2020-04-07 20:40
单位换算:2.24L=______cm3;0.9×103kg/m3=______g/cm3;200mg=______kg;168km=______nm.
单位换算:2.24L=______cm3; 0.9×103kg/m3=______g/cm3;200mg=______kg;168km=______nm.
①∵1L=103cm3,∴2.24L=2.24×103cm3;②∵1kg/m3=10-3g/cm3,∴0.9×103kg/m3=0.9×103×10-3g/cm3=0.9g/cm3;③∵1mg=10-6kg,∴200mg=200×10-6kg=2×10-4kg;④∵1km=1012nm,∴168km=168×1012nm=1.68×1014nm...