问题
填空题
变换单位:
(1)2 m/s=______km/h (2)7.8g/cm3=______kg/m3
答案
2 m/s=
=2m 1s
=7.2km/h;7.8g/cm3=2×
km1 1000 1×
h1 3600
=7.8g 1cm3
=7.8×103kg/m37.8×
kg1 1000 1×10-6m3
故答案:(1)7.2;(2)7.8×103
变换单位:
(1)2 m/s=______km/h (2)7.8g/cm3=______kg/m3
2 m/s=
=2m 1s
=7.2km/h;7.8g/cm3=2×
km1 1000 1×
h1 3600
=7.8g 1cm3
=7.8×103kg/m37.8×
kg1 1000 1×10-6m3
故答案:(1)7.2;(2)7.8×103