Bardzo proszę o pomoc! Muszę przeliczyć: 7200kg/m³ na g/cm³ 20g/cm³ na g/dm³ 15km/h na m/s 20km/h² na m/s² 360 km/h na m/s

7200kg/m3 =? g/cm3 1kg =1000g 1cm3 =0,000001m3 7200kg/m3 =7200 *1000g/0,000001cm3 = 7,3g/cm3   20g/cm3 =? g/dm3 1cm3 =0,001dm3 20g/cm3 = 20g/0,001dm3 = 20 000g/dm3   15km/h =? m/s 1km =1000m 1h =3600s 15km/h =15 *1000m/3600s =4,17m/s   20km/h2 = ? m/s2 1h2 =(3600s)^2 20km/s2 =20 *1000m/(3600s)^2 =0,0015m/s2   360km/h =? m/s 360km/h =360 *1000m/3600s =100m/s     (^ do potęgi)