Question

Kk bisa tolong ketjakan yg nomor 5 pakai caranya kalo bisa nomor 4 juga :)

Answer 1

4. Diket:
volume balok = p x l x t
V = 10 x 5 x 8
V = 400 cm³ = 400 x 10⁻⁶m³ = 4 x 10⁻⁴ m³
ρ = 0,24 kg/m³
Dit: m....?
m = ρ V
m = 0,24 x 4x10⁻⁴
m = 0,96x10⁻⁴
m = 0,000096 kg (jawab B)
,
5. Diket:
lo = 10 m
t₁ = 25'c
t₂ = 75'c
α = 1,67 x10⁻⁵
Dit: Δl dan l....?
Δl = lo α (t₂-t₁)
Δl = 10 x 1,67x10⁻⁵ (75-25)
Δl = 10 x 1,67x10⁻⁵ (50)
Δl = 835x10⁻⁵
Δl = 0,00835 m
,
l = Δl + lo
l = 0,00835 + 10
l = 10,00835 m