Question

A liquid_p = 1.45 g/cm^2) flows through a horizontal pipe of varying cross section as in the figure below. In the first section, the cross-sectional area is 10.0 cm^2, the flow speed is 248 cm/s, and the pressure is 1.20 times 10^5 Pa. In the second section, the cross-sectional area is 4.50 cm^2. Calculate the smaller section's flow speed. (Enter your answer to at least two decimal places.) m/s Calculate the smaller section's pressure. Pa Whole blood has a surface tension of 0.058 N/m and a density of 1, 050 kg/m^3. To what height can whole blood rise in a capillary blood vessel that has a radius of 1.8 times 10^-6 m if the contact angle is zero? m A hypodermic needle is 2.72 cm in length and 0.22 mm in diameter. What pressure difference between the input and output of the needle is required so that the flow rate of water through it will be 1 g/s? (Use 1.0 times 10^-3 Pa s as the viscosity of water) Pa Glycerine in water diffuses along a horizontal column that has a cross-sectional area of 1.9 cm^2. The concentration gradient is 2.8 times 10^-2 kg/m^4 and the diffusion rate is found to be 5.8 times 10^-15 kg/s. Determine the diffusion coefficient. m^2/s

Answer 1

6) mass flow rate = $\pi$ x density(dP)d⁴/128nL

0.001 = $\pi$ x 1000 x (dP) x (0.22 x 10^-3)⁴/(128 x 10^-3 x 0.0272)

dP = 4.73084 x 10⁵ Pa