Correct! Question 1 8 / 8 pts the absolute viscosity of glycerin at 20 C IS 1.49 kg/m s. It fills the narrow space between a hollow sleeve of 12 cm and a fixed coaxial solid rod of diameter 11.8 cm. The outer sleeve rotates at 120 rev/min. we wish estimate the torque in N m per rod length, to hold the inner rod fixed.. Neglect end effects (the rod is very long). We will break this into several steps. What is the velocity of the outer sleeve in m/s? .12 m/s 0.75 m/s 12.5 m/s 45 ms/s Question 2 8/8 pts the absolute viscosity of glycerin at 20 C IS 1.49 kg/m s. It fills the narrow space between a hollow sleeve of 12 cm and a fixed coaxial solid rod of diameter 11.8 cm. The outer sleeve rotates at 120 rev/min. estimate the torque in N m per rod length, to hold the inner rod fixed.. Neglect end effects (the rod is very long). Using the velocity from Q1, what is the shear stress on the sleeve? 110 Pa Correct! 1100 Pa 260 Pa 552 Pa Question 3 8/8 pts the absolute viscosity of glycerin at 20 C IS 1.49 kg/m s. It fills the narrow space between a hollow sleeve of 12 cm and a fixed coaxial solid rod of diameter 11.8 cm. The outer sleeve rotates at 120 rev/min. estimate the torque in N m per rod length, to hold the inner rod fixed. Neglect end effects (the rod is very long). What is the torque required to turn the sleeve? N m / meter 6 Nm/m Correct! 24 Nm/m 12 Nm /m 2.4 Nm/m Correct! Question 4 8/8 pts Glycerin has a viscosity of 1.49 kg/ m s. It is contained between two flat plates, spaced 6 mm apart. The top plate moves at 2.5 m/s horizontally, while the bottom plate is fixed. Assuming a linear velocity profile (thin gap), what is the shear stress to move the plate? 620 KPa 1240 Pa 310 Pa 620 Pa Correct! Question 5 8/8 pts Glycerin has a viscosity of 1.49 kg/ m s. It is contained between two flat plates, spaced 6 mm apart. The top plate moves at 2.5 m/s horizontally, while the bottom plate is fixed. Using the shear stress from Q4: If the plate has dimensions of .5 m wide and 2 m long, what is the FORCE required to pull the plate? 310 N 620 N 145 N 1240 N Question 6 8/8 pts Glycerin has a viscosity of 1.49 kg/ m s. It is contained between two flat plates, spaced 6 mm apart. The top plate moves at 2.5 m/s horizontally, while the bottom plate is fixed. how much POWER is required to keep the plate moving a t constant speed? Correct! 3000 W 1550 W 775 W 380 W Correct! Question 7 8/8 pts A shaft 8.00 cm in diameter is being pushed through a bearing sleeve 8.02 cm in diameter and 30 cm long. The clearance, assumed uniform, is filled with oil with a viscosity of 4.49 kg/m s. The shaft moves axially at 0.5 m/s. Estimate the resistance force. (this takes several steps, but you should have that logic from prior problems).. 16900 N 1690 N 850 N 3400 N Question 11 12/12 pts A 3-m-high, 7.5-m-wide rectangular gate is hinged at the top edge at A and is restrained by a fixed ridge at B. Determine the hydrostatic force exerted on the gate by the 2-m-high water and the location of the pressure center. Take the density of water to be 1000 kg/m throughout. 3 m Gate The hydrostatic force exerted on the gate by the water is KN. The vertical distance of the pressure center from the free surface of water is Correct! F = 147 kN F = 441 kN F = 330 kN F = 220 kN m.