Problem 6: Calculate the speed of efflux of kerosene oil from a narrow hole of a tank in which pressure is 4 * 10^-3 atm. Density of kerosene oil is 72 kg m-3. (one atmosphere = 1.03 * 105 pa).
Given data Pressure = 4 × 10-3 atm = 4 × 10-3 × 1.03 × 105 pa = 4.12 × 102 pa
Density of kerosene oil =0. 72 kg/m2
Required Speed of efflux = v =?
Formula Torricelli’s Theorem
Theory: Since we are not given with the height h of the tank, so to use the above formula we first find the height of the tank. As
Put the values from the given data
Put the values in the formula from the given data
This is the required velocity of efflux.
Velocity of efflux means the average flow rate of kerosene oil emitted from the tank in the atmosphere.