Quiz 9 (Sections 4.4-4.5)

Question 1

Which principle states that the buoyant force on an object is exactly equal to the weight of the fluid that is dispaced?

Answer 1

Archimede’s principle

Question 2

The phenomenon of a spinning cylinder or ball generating lift is called the ___ effect.

Answer 2

Magnus

Question 3

The angle of an airplane wing relative to the fluid flow is called the angle of ___.

Answer 3

attack

Question 4

The science of shaping objects to allow the smooth flow of fluids around them and reduce drag is called ___.

Answer 4

streamlining

Question 5

What is the most important factor that affects drag?

Answer 5

shape of the object

Question 6

What is the general term for a structure designed to produce lift as it moves through the fluid?

Answer 6

foil

Question 7

The point at which the weight of a submarine is exactly equal to the weight of the water displaced is called the point of ___ buoyancy.

Answer 7

neutral

Question 8

The technique of using buoyancy to determine the specific gravity of a solid object is __ weighing.

Answer 8

hydrostatic

Question 9

The phenomenon in which the lateral pressure exerted by a moving fluid decreases as the fluid’s speed increases is the ___ effect.

Answer 9

Bernoulli