Calculate the density of a block of mass 20g and volume 10cm Give your answer in S.I unit.

Density ($\rho$) inapatikana kwa kugawanya masi ($m$) kwa ujazo ($V$).

$$\rho = \frac{m}{V}$$

Kitengo cha S.I. cha masi ni kilogramu (kg).
Kitengo cha S.I. cha ujazo ni mita za ujazo ($\text{m}^3$).

Masi ($m$) = $20\text{ g}$
Kubadilisha gramu kuwa kilogramu: $1\text{ kg} = 1000\text{ g}$

$$m = 20\text{ g} \times \frac{1\text{ kg}}{1000\text{ g}} = 0.02\text{ kg}$$

Ujazo ($V$) = $10\text{ cm}^3$
Kubadilisha sentimita za ujazo kuwa mita za ujazo: $1\text{ m} = 100\text{ cm}$, hivyo $1\text{ m}^3 = (100\text{ cm})^3 = 1,000,000\text{ cm}^3$.

$$V = 10\text{ cm}^3 \times \frac{1\text{ m}^3}{1,000,000\text{ cm}^3} = 0.00001\text{ m}^3$$

Sasa tumia masi na ujazo katika vitengo vya S.I.

$$\rho = \frac{0.02\text{ kg}}{0.00001\text{ m}^3}$$ $$\rho = 2000\text{ kg/m}^3$$

Density ya block ni:

$$\text{2000 kg/m}^3$$