Question

dau coronita urgent!​

Answer 1

Explicație pas cu pas:

a)

${\frac{l_{1}}{l_{2}}} = \frac{5}{10} = \frac{1}{2} \implies \\ \frac{A_{1}}{A_{2}} = {\Big(\frac{l_{1}}{l_{2}}\Big)}^{2} = {\Big(\frac{1}{2}\Big)}^{2} = \bf \frac{1}{4}$

b)

$l_{1} = 3,2 \: dm = 32 \: cm; \ \ L_{1} = 0,4 \: cm \\ l_{2} = 0,5 \: cm;\ \ L_{1} = 0,5 \: dm = 5 \: cm \\ \implies \\ \frac{A_{1}}{A_{2}} = {\frac{l_{1} \cdot L_{1}}{l_{2} \\ \cdot L_{2}}} = {\frac{32 \cdot 0.4}{0.5 \cdot 5}} = \frac{12.8}{2.5} = \bf 5.12$