zamiana jednstki : 16dag =  ..... kg 15k/h =  ..... m/s 51050hPa = ..... Pa 30m/s = ...... km/h 2mg = ..... kg -20*C = ...... K K to kelmin  

16dag=1,6kg,   1kg=10dag 15km/h=15000m/3600s=4.1(6) m/s 51050 hPa=5105000 Pa 30 m/s=(30/1000) / (1/3600)=120 km/h 20mg=20 x10^-3 x10^-3 kg=20 x10^-6 kg   -20*C=253 K