Question on: JAMB Physics - 2024
A solid cube of aluminum is 1.5 cm on each edge. The density of aluminum is 2700 kg/m3. Find the mass of the cube.
A
7.5 g
B
9.1 g
C
12.0 g
D
15.0 g
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Correct Option: B
Here's how to solve the problem:
- Calculate the volume of the cube: V = side³ = 1.5 cm x 1.5 cm x 1.5 cm = 3.375 cm³
- Convert to m³: V = 3.375 x 10⁻⁶ m³
- Calculate mass: m = ρ x V = 2700 kg/m³ x 3.375 x 10⁻⁶ m³ = 0.0091125 kg
- Convert to grams: m = 0.0091125 kg x 1000 g/kg ≈ 9.1 g
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