Question

A substance has a mass of 0.02kg and a volume of 0.08m3. What is its density? Give your answer to one decimal place

Answer 1

• Mass,m = 0.02 kg
• Volume, V = 0.08m ³
• Density, P =?

As we know –

• Density = Mass/Volume

⟶ P = m/V

⟶ P = 0.02/0.08

⟶ P = 0.25 kg/m ³

⟶ P = 0.3 kg/m ³

• Henceforth, Density will be 0.3 kg/m ³.

Answer 2

This in an exercise of fluids and their fundamental characteristics.

• Density of liquids and gases

                  $\large\displaystyle\text{ \begin{gathered}\sf \bf{D=\frac{Mass \ contained \ in \ said \ substance}{Volume \ unit} } \end{gathered} }$

To start solving this exercise, we obtain the following data:

• m = 0.02 kg
• v = 0.08 m³
• d = ¿?

To calculate density, divide the mass by the volume.

• We apply the following formula: d = m/v

We substitute our data in the formula and solve:

                                         $\large\displaystyle\text{ \begin{gathered}\sf \bf{d=\frac{m}{v} } \end{gathered} }$

                                         $\large\displaystyle\text{ \begin{gathered}\sf \bf{d=\frac{0.02 \ kg}{0.08 \ m^{3 } } } \end{gathered} }$

                                        $\large\displaystyle\text{ \begin{gathered}\sf \bf{d=0.25 \ kg/m^{3} } \end{gathered} }$

                                       $\boxed{\large\displaystyle\text{ \begin{gathered}\sf \bf{d=0.3 \ kg/m^{3} } \end{gathered} }}$

• The density of the substance is 0.3 kg/m³.

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