In a gas turbine, air (kinematic viscosity of 1x104-5 m 2/s) flows over a 2 cm long turbine blade at 100 m/s. how long should the blade be in my lab's wind tunnel (air, kinematic viscosity of 1.5x10a-5 ma2/s, velocity of 10 m/s), to match the reynolds number of the gas turbine? a)-2cm b)-30cm c)-0.3cm

30 cm

Explanation:

For  Reynold's number similarity between model and prototype we should  have

Given L(prototype)= 2cm

V(prototype) = 100m/s

V(model) = 10m/s

 Thus applying values in the above equation we get

Solving for Lmodel we get Lm = 30cm

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.

answer:

explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.