p1=7,1 g/cm cub
p2=8,9g/cm cub
m=4kg
a)daca m2=2,5kg rezulta m1=m-m2
m1=1,5kg
V=m/p
m=m1+m2
p=p1+p2
V=V1+V2
V1=m1/p1
V2=m2/p2
V=m1/p1+m2/p2
V=492,166cm cubi
p=m/V
p=4000g/492,166
p=8,12733915g/cm cub
b)daca m1=m2=m/2=2kg=2000g(daca masele sunt egale atunci si volumele se schimba)
V1=m1/p1
V1=281.69cm cubi
V2=m2/p2
V2=224.719
p'=m/(V1+V2)
p'=7,89875g/cm cub
DACA NU INTELEGI INTREABA,RASPUNSURILE SUNT DE LA PG 104 IN SUS,IAR RASPUNSUL PT PROBLEMA ACESTA ERA LA PG 119