4B: Fluids and Gases Flashcards
1
Q
- Relation of flow rate and radius
- Relation of flow rate and length
A
- directly proportional to radius to the fourth power
- inversely proportional to length
2
Q
How do temperature and surface area effect surface tension?
A
As temperature and surface area increase, surface tension decreases
-molecules stretch apart so easier to break bonds
3
Q
(T/F) Proportion of object submerged in water is the same as its specific gravity
A
True
4
Q
venturi effect: when fluid flows in constricted area, what happens to pressure?
A
Pressure decreases (high speed, low pressure)
5
Q
cohesion and adhesion
A
cohesion-attraction of IMF between molecules of same substance (convex)
adhesion-attraction of IMF between different molecules (concave)
6
Q
Bernoulli Equation: decrease pressure does what to velocity?
A
decreased pressure cause increase in kinetic energy (increase velocity)
