If the density of air is \( \rho_{a} \) and that of the liquid \( \rho_{l} \), then for a given ...

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If the density of air is \( \rho_{a} \) and that of the liquid \( \rho_{l} \), then for a given piston speed the rate (volume per unit time) at which the liquid is sprayed will be proportional to
(1) \( \sqrt{\frac{\rho_{a}}{\rho_{l}}} \)
(2) \( \sqrt{\rho_{a} \rho_{l}} \)
(3) \( \sqrt{\frac{\rho_{l}}{\rho_{a}}} \)
(4) \( \rho_{l} \)
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