17) When the flow parameters at any given instant remain same at every point, then flow is said to be

18) Which of the following is demensionless

19) The normal stress in a fluid will be constant in all directions at a point only if

20) The pressure at a point in a fluid will not be same in all the directions when the fluid is

21) An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ′g′ at this place is