Question

Puteti sa ma ajutati la 3.5 va rog? Multumesc!

Answer 1

ρ1-ρ2=1 g/cm³=1000 kg/m³

m1/m2=2,256=>m2=m1/2,256=4,4/2,256=1,95 kg

V1/V2=2=>V1=2V2

ρ1=m1/V1=4,4/2V2=2,2/V2

ρ2=m2/V2=1,95/V2

ρ1-ρ2=1000<=>2,2/V2-1,95/V2=1000<=>0,25/V2=1000=>V2=0,25/1000=0,00025 m³=0,25 cm³

V1=2V2=2*0,25=0,5 cm³

ρ1=2,2/0,00025=8800 kg/m³

ρ2=1,95/0,00025=7800 kg/m³

m=m1+m2=2,2+1,95=4,15 kg

V=V1+V2=0,25+0,5=0,75 cm³=0,00075 m³

ρ=m/V=4,15/0,00075=5533,33 kg/m³