Question

3. The density of a solid of mass 2kg and volume 100 cubic centimetre is ​

Answer 1

Explanation:

density(p) = mass (m) / volume (v)

therefore,p= 2 kg/100 cm^3

then,density = 0.002g/cm^3

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Answer 2

Answer

Density = 20,000 Kg/m³

Given

Mass , m = 2 Kg

Volume , V = 100 cc

To Find

Density , ρ

Concept Used

Density :

It is defined as mass per unit volume .

$\bf \bigstar \;\; Density=\dfrac{Mass}{Volume}\\\\\bf \bigstar \;\; \rho=\dfrac{m}{V}$

SI unit of Density Kg/m³

SI unit of Mass is Kg

SI unit of Volume is m³

Solution

Mass , m = 2 Kg

Volume , V = 100 cm³

⇒ V = 100 × ( 10⁻²m )³

⇒ V = 100 × 10⁻⁶ m³

⇒ V = 10² × 10⁻⁶ m³

⇒ V = 10⁻⁴ m³

Apply formula ,

$\implies \rm \rho=\dfrac{m}{V}\\\\\implies \rm \rho =\dfrac{2}{10^{-4}}\\\\\implies \rm \rho =2\times 10^4\\\\\implies \rm \rho =20,000\ Kg/m^3$