Couette flow is zero fluid slip at the boundary or boundaries, such as a sliding rigid plate, (ski or sled on a melted snow film), or a cylinder sliding along a tube (an oiled piston or projectile in a air-filled gun barrel), or a shaft rotating in a supporting bearing. a. True

b. False

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.