iran-konkur 2013 Q193

iran-konkur · Other · konkur-riazi_1392 Not Maths
193- The sound intensity is $I = 3.2\times10^{-3}\,\dfrac{\text{W}}{\text{m}^2}$. The sound level in decibels is? $\left(\log 2 = 0.3,\quad I_0 = 10^{-12}\,\dfrac{\text{W}}{\text{m}^2}\right)$
(1) 15 (2) 25 (3) 85 (4) 95
\textbf{193-} The sound intensity is $I = 3.2\times10^{-3}\,\dfrac{\text{W}}{\text{m}^2}$. The sound level in decibels is? $\left(\log 2 = 0.3,\quad I_0 = 10^{-12}\,\dfrac{\text{W}}{\text{m}^2}\right)$

(1) 15 \hfill (2) 25 \hfill (3) 85 \hfill (4) 95