iran-konkur 2020 Q194

iran-konkur · Other · konkur-riazi_1399_specialized_old-curriculum Not Maths
194. According to the figure below, inside a U-shaped tube connected to a gas reservoir, the space is equally filled with water and oil. What is the gas pressure in the reservoir in millimeters of mercury?
[Figure: A U-shaped tube with a gas reservoir on the left side; water at the bottom and oil on the right; the height difference is labeled $68\,\text{cm}$.]
$$\left(\rho_{\text{mercury}} = 13/6\,\frac{\text{g}}{\text{cm}^3},\quad \rho_{\text{water}} = 0/8\,\frac{\text{g}}{\text{cm}^3},\quad \rho_{\text{oil}} = 0/8\,\rho_{\text{water}},\quad g = 10\,\frac{\text{m}}{\text{s}^2}\right)$$
  • [(1)] $1$
  • [(2)] $5$
  • [(3)] $10$
  • [(4)] zero

\textbf{194.} According to the figure below, inside a U-shaped tube connected to a gas reservoir, the space is equally filled with water and oil. What is the gas pressure in the reservoir in millimeters of mercury?

\textit{[Figure: A U-shaped tube with a gas reservoir on the left side; water at the bottom and oil on the right; the height difference is labeled $68\,\text{cm}$.]}

$$\left(\rho_{\text{mercury}} = 13/6\,\frac{\text{g}}{\text{cm}^3},\quad \rho_{\text{water}} = 0/8\,\frac{\text{g}}{\text{cm}^3},\quad \rho_{\text{oil}} = 0/8\,\rho_{\text{water}},\quad g = 10\,\frac{\text{m}}{\text{s}^2}\right)$$

\begin{itemize}
    \item[(1)] $1$
    \item[(2)] $5$
    \item[(3)] $10$
    \item[(4)] zero
\end{itemize}

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