3. a) What is the Reynolds number of a 2-mm diameter plastic bead sinking in a test-tube ll with honey at 20C? (Express your answer in terms of speed v) My: 1400 kg/'rns and My: 10 Pa s. [Answer in 3 signicant gures] b) Determine the terminal speed of the plastic bead in the honey. Density of plastic = 0.925 gcms. c) How long time for the bead to reach half of its terminal speed? d) How long does the bead takes to sink to the bottom of the test-tube? The honey has a depth of 1.0 cm. Take the initial speed of the bead 0 MS at the surface of the honey