Question

Va rog imi trebuie urgent!

Answer 1

Explicație:

1. 1.A

2.A

3. F

4. A

2.

ρ= 1,2 g/cm³

m= 120g

________

V=?

ρ= m/V => V= m/ρ= 120g/1,2g/cm³= 100 cm³

3.

l= 5cm

ρ= 0,9g/cm³

_________

m=?

Vcub= l³ = 5cm•5cm•5cm = 125cm³

ρ= m/V => m = ρ•V= 0,9g/cm³•125cm³= 112,5g

4.

0,78g/cm³= 0.00078kg/m³