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JAMB Physics 2024 Paper

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Question : 12

Total: 125

A solid cube of aluminum is 1.5cm on each edge. The density of aluminum is 2700kgm

^{-1}

. Find the mass of the cube.

7.5g
9.1g
12.0g
15.0g

Solution:

Concept:

The mass of the cube is obtained by multiplying its density by its volume.

Explanation:

Volume of the cube:

V = (1.5\text{ cm})^3 = 3.375\text{ cm}^3

.

Convert density to grams per cubic centimeter:

2700\text{ kg/m}^3 = 2.7\text{ g/cm}^3

.

Use the relation:

\text{mass} = \text{density} \times \text{volume}

.

So,

m = 2.7 \times 3.375 = 9.1125\text{ g}

.

This is approximately

9.1\text{ g}

.

Answer:

B. 9.1g

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