Ch 13: Fluids

Question 1

A fluid exerts an upward buoyant force F_B on an object immersed in or floating on the fluid. The magnitude of the buoyant force equals the ______ of the _____ displaced by the object.

Answer 1

weight of the FLUID

Question 2

What is the formula for the buoyant force F_B?

Answer 2

F_B = ρ_f V_f g

• ρ_f*represents the density of the fluid
• V_f* represents the volume of the displaced fluid

g is gravity

Question 3

Buoyant force does not depend on the _____ of the object underwater. It is the same at ___ ______.

Answer 3

depth

all depths

Question 4

absolute pressure is equal to…

Answer 4

….gauge pressure + atmospheric pressure

Question 5

Since fluid is incompressible, the volume flow rate through a tube must be constant. Since the volume flow rate is constant, ____ x _____ must be constant along the pipe. The fluid will move _______ where the area is _______, and therefore the radius is smallest.

Answer 5

area x speed

fastest, smallest