194) When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

195) When the Mach number is between __________ the flow is called super-sonic flow.

196) The property of a liquid which controls its rate of flow is called viscosity.

197) The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is

198) The factional resistance of a pipe varies approximately with __________ of the liquid.