31. If the depth of water in an open channel is greater than the critical depth, the flow is called
32. When the Mach number is more than 6, the flow is called
33. When the Mach number is less than unity, the flow is called
34. The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.
35. The power produced by the reaction turbine is ________ to the head of water.
36. For a body floating in a liquid the normal pressure exerted by the liquid acts at
37. For hypersonic flow, the Mach number is
38. A flow is called hyper-sonic, if the Mach number is
39. A flow is called sub-sonic, if the Mach number is
40. Metacentric height is the distance between the metacentre and
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