1. (25 pts) Please answer all of the following questions. Answer each briefly a. (4 pts) What is the physical meaning of Reynolds number? b. (6 pts) What is the microscopic (molecular level) origin of pressure and shear stress? c. (4 pts) After the pandemic is over, you are going to scuba diving in the Caribbean Sea. As you dive down further and further, how is the pressure changing? How about when you move laterally only? Do not ignore gravity. Assume that water is stationary. d. (5 pts) You enjoy making smoothie at home using your blender. One day, you decide to make it super sweet by adding a large portion of honey into water for blending. At the same setting of blade speed, how would the shear force (and therefore blender power consumption) change by adding more honey? Please explain. e. (6 pts) You and your friend are throwing a ball back and forth between the two of you. You both are wearing roller blades. How would the two of you move as this game proceeds? Please explain