单位换算:(1)4.6km=______m=______μm (2)730nm=__...
单位换算:(1)4.6km=______m=______μm(2)730nm=______mm=______dm(3)0.5h=______min=______s....
单位换算:(1)4.6km=______m=______μm (2)730nm=______mm=______dm(3)0.5h=______min=______s.
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(1)∵1km=103m,∴4.6km=4.6×103m;
∵1km=109μm,∴4.6km=4.6×109μm;
(2)∵1nm=10-6mm,∴730nm=730×10-6mm=7.3×10-4mm;
∵1nm=10-8dm,∴730nm=730×10-8dm=7.3×10-6dm;
(3)∵1h=60min,∴0.5h=0.5×60min=30min;
∵1h=3600s,∴0.5h=0.5×3600s=1800s.
故答案为:(1)4.6×103;4.6×109;
(2)7.3×10-4;7.3×10-6;
(3)30;1800.
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