We used a linear velocity profile in the class example for torque calculation in between cylinders. for flow through a pipe, the velocity profile in cylindrical coordinates can be expressed as where r is measured from the centerline where-. ve and r is the pipe radius. find t(r) and dv/dr. (5 pt bonus) plot r(r) and dv/dr versus r.

Why is alchemy not considered to be a science ?

What is a subatomic particle with a negative charge and very little mass?

Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.