Question

Cat cantareste un geam din sticla cu S=2500 Kg/m³ cu lungimea L=2 cm , h=8 dm si grosimea 0,5 cm?

Answer 1

Masa oricarui corp este: V*p (densitatea)
V= L*l*h = 2*80*0,5= 80cm³
Astfel, masa= V*p= 80cm³ * 2 500 000g / 1 000 000 cm³ = 200g

Answer 2

2cm=0.02m
8dm=0.8m
0.5cm=0.005m
⇒V=L*l*h=0.02m*0.8m*0.005m=0.00008m³

p=m/V
m=p*V
m=2500kg/m³ *0.00008m³
m=0.2kg=200g