Determine the density of a metal bar weighing 0.78 kg if its length is 0.5 cm, width 20 cm, height 1 m.
| March 11, 2021 | education
m = 0.78 kg.
a = 0.5 cm = 0.005 m.
b = 20 cm = 0.2 m.
h = 1 m.
ρ -?
ρ = m / V.
V = a * b * h.
ρ = m / a * b * h.
ρ = 0.78 kg / 0.005 m * 0.2 m * 1 m = 780 kg / m ^ 3.
Answer: ρ = 780 kg / m ^ 3.
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