explanation:-pressure is inversely proportional to the velocity. so, with the increase in pressure, the exit velocity decreases. we know that the pressure is equal to force per unit area, this contradicts the above statement.
explanation:-the prandtl number is a dimensionless number. it approximates the ratio of momentum diffusivity to thermal diffusivity. it can be expressed as pr = v/ α(1). where α= thermal diffusivity and v= momentum diffusivity.
explanation:-pumps increase pressure rather than velocity. during the pumping process, a housing is provided for the pumping elements. these parts can change the speed. pumps create a passage way that will squirt the fluid passing through it. thus, pumping increases pressure.
23. Which among the following is the formula for volumetric flow rate?
explanation:-volumetric flow rate is given by q= a.v. where v is the flow velocity of the fluid, and a is the area of cross section of the surface. area of a surface is also called as the vector area. thus, the right answer is q = av.
24. Which among the following is the formula for mass flow rate?