Couette flow: flow between 2 long concentric cylinders of radii ro and ri, created by the rotation of one of them. solve the flow problem for a newtonian, incompressible fluid for the following two cases:

1. the outer cylinder of radius ro is rotating with an angular velocity ω (s^-1 for units). also calculate the torque for this.

2. the inner cylinder of radius ri is rotating with an angular velocity -ω (s^-1 for units). also calculate the torque for this.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation