Question

Ajutorrrrrr

Dau coroanaaaa




Urgentttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt

Answer 1

18 km / h = 18 000 m / 3600 s =  5 m/s

15 m/s  = 15  x 3600 = 54 000 m/ ora = 54 km/ora

7,8 g / cm³ = 7 800 kg / m³

5 l = 0,005 m³

densitate apa = 1 kg / dm³ = 1 kg / 1000 cm³

1000 cm³  ..............1000 g

  500 cm³ .................x grame

x = 500 x 1000 : 1000 = 500 grame

500 cm³ apa cantaresc  = 0,5 kg = 500 grame