Răspunsuri

2014-09-28T21:50:51+03:00
20m/s=20 ori1/1000/1/60=1.2km/min=20ori1/1000/1/3600=72km/h
12kg/m3=12ori1000/1000000=0,012g/cm3=0,012 /1000=1,2 ori 10 la -5