Chapter 9: Fluids and Solids

Question 1

A researcher is observing a fluid flowing in a pipe. He measures the velocity of the flow at both ends of the pipe and wants to know the relative pressure of each end. Which of the following equations will be most useful to him.
Select one:
a. Bernoulli's equation 
b. Doppler's effect
c. Continuity Equation

Answer 1

a. Bernoulli’s equation

Question 2

Bernoulli's equation describes a relationship between which variables?
Select one:
a. Pressure, flow rate and speed
b. Pressure, Volume and speed
c. Pressure, Volume and height
d. Pressure, speed and height

Answer 2

Pressure, speed, and height

Question 3

In the drawing, water flows from a section of a pipe to a narrow section. In which part of the pipe is the volume flow rate the greatest?
Select one:
a. The wide section
b. The narrow section
c. The volume flow rate is the same in both sections of the pipe.

Answer 3

The volume flow rate is the same in both sections of the pipe.

Question 4

The density of lead is greater than that of iron, and both are denser than water. Compared to a solid iron object of the same dimensions, the buoyant force acting on a solid lead object is
Select one:
a. Equal 
b. Smaller
c. Greater

Answer 4

Equal

Question 5

Which of the following is true regarding Archimedes Principle?
Select one:
a. It states that the buoyant forces increases as the density of the object in the fluid increases.
b. It states that the weight of an object in static equilibrium is equal to the weight of liquid it displaces
c. It is not applicable for an object that is completely submerged in a liquid.

Answer 5

It states that the weight of an object in static equilibrium is equal to the weight of liquid it displaces.