Question

Darth Maul is doing some mechanical work on a new engine for his landspeeder. Engine oil (assume he is using SAE 10 ... see table below) passes through a 1.30 mm diameter tube in his newly created engine. The tube is 5.4 cm long. What pressure difference is needed to maintain a flow rate of 5.2 mL/min? (Note: 1 mL = 1 cm3)

Pa

The coefficients of viscosity for various fluid

Coefficients of Viscosity Fluid Coefficient (temperature of vis in CD) m (Pa s) Water (0%) 1.8 x 10 3 1.0 x 10 (20°) 0.3 x 10 (1000) Whole blood (37%) N4 x 10 Blood plasma (370) 1.5 x 10 Ethyl alcohol (200) 1.2 x 10 Engine oil (30 200 x 10 (SAE 10) Glycerine (200) 1500 x 10 Air (20%) 0.018 X 10 Hydrogen (03) 0.009 x 10 Water vapor (1000) 0.013 X 10 1 Pa.s 10 P 000 cP.

Answer 1

we know

where $\Delta x$=length

rest all symbol we know

so we get

Q=5.2mL/min=8.667*10^(-8)

r=0.65mm =0.65*10^(-3) m

viscosity=200*10^(-3)

so we got p=13352.5 pa