Chapter 3-5

Question 1

Which of the following does not contribute to the rise of water in a small tube?
Adhesion
Atmospheric pressure 
Cohesion 
Gravity

Answer 1

Gravity

Question 2

The curved surface of a liquid inside a small tube is called a ….

Answer 2

Meniscus

Question 3

The resistance of molecules to flow because of their attraction to other like molecules and to walls of their container is called…

Answer 3

Viscosity

Question 4

Which of the following gases is the most abundant in the atmosphere ?

Answer 4

Nitrogen 78%

Question 5

A hydraulic device functions based on ….

Answer 5

A confined liquid multiplying force

Question 6

The distance below the highest level of water in a closed system is the ……

Answer 6

Water head

Question 7

If voltage is directly proportional to current and the current increases what happens to the voltage?

Answer 7

Voltage increases by same factor as the current

Question 8

Which of the following is not a unit of pressure?

Answer 8

These are units of pressure:
Pa

N/m^2

Question 9

Which of the following is not a value of standard atmospheric pressure ?

Answer 9

These are Standard Units of atmospheric Pressure:
1 atm
760mm of Hg
760 torr
1.013 x 10^5 Pa and  101.3 kPa
1.013 bar and 1013 mbar (millibar)

Question 10

The study of liquids at rest is called ….

Answer 10

Hydrostatics

Question 11

Which of the following is concerned only with the proportionality between volume and temperature at a constant pressure?

Answer 11

Charles’s law

Question 12

Avogadro’s number is equal to ….

Answer 12

6.022 x 10^23 molecules

Question 13

A device that transports air or is driven by air pressure is called a(n).,,,

Answer 13

Pneumatic device

Question 14

Which of the following principals is true for all fluids?

Answer 14

Archimedes’ principle

Question 15

Which of the following does not use a liquid?

Answer 15

Aneroid barometer

Question 16

If a gas inside a rigid, solid steel container is heated at 350 K, ….

Answer 16

Pressure will increase

Question 17

If the diameter of a pipe is halved, the velocity of the liquid inside it will….

Answer 17

Increase

Question 18

A deformative force per unit cross sectional area is called ….

Answer 18

Stress

Question 19

The point beyond which a stretched substance will not return to its original length is called its ….

Answer 19

Elastic limit

Question 20

What is the maximum amount of relative deformation that may be permanently placed upon an object?

Answer 20

Plasticity

Question 21

Completion

Any substance capable of flowing is called a(n)..,,

Answer 21

Fluid

Question 22

The attractive force between like molecules is called ….

Answer 22

Cohesion

Question 23

The fact that lateral pressure decreases as a fluid’s velocity increases is called …….. Principle.

Answer 23

Bernoulli’s

Question 24

Using a fluid stream to catch up and carry another fluid is called ….

Answer 24

Entrained

Question 25

The man who stated, “At the same temperature and pressure, two gases of the same volume have the same number of molecules” was …..

Answer 25

Avogadro

Question 26

A(n) device uses a confined liquid to multiply force.

Answer 26

Hydraulic device

Question 27

The amount of deformation required to bring a material to its elastic limit is called….

Answer 27

Resilience

Question 28

When a material is shaped by being pressed between heavy rollers, the material has undergone the mechanical process of ….

Answer 28

Forging

Question 29

A material that can recover its original shape after deformation displays the property of ….

Answer 29

Elasticity

Question 30

True/False
Liquid ejected from an orifice at the bottom of a container will travel a farther distance than liquid coming from an orifice at the middle of a container.

Answer 30

False

Question 31

The shape of a container *does not * affect the pressure on the bottom.

Answer 31

True

Question 32

The lateral pressure on a dam is the same at all depths.

Answer 32

Is not the same

Question 33

In reality, nature permits a vacuum.

Answer 33

Abhors

Question 34

A barameter is a laboratory device which is used to measure the pressure of a gas sample.

Answer 34

Manometer

Question 35

Equation

The law of liquid pressure.

Answer 35

P=pgh

Question 36

Short Answer

Define force and pressure

Answer 36

Force is any push or pull on an object.

Pressure is the amount of force brought to bear on a unit area of surface.

Question 37

Explain how surface tension creates spherical droplets of water

Answer 37

Surface tension is a liquid’s resistance to increase it surface area. Once the water achieves a spherical shape, contraction can proceed no farther because a sphere has the least surface area of any other shape with equivalent volume.

Question 38

What two factors affect air pressure? What causes atmospheric pressure ?

Answer 38

Two factors that affect air pressure: temperature and the number of air molecules.

Causes of atmospheric pressure: Atmospheric pressure is caused by earth’s gravitational pull of air molecules in its reach. Also, the molecules in the lower atmosphere are confined by the downward force, or weight of the air molecules above them, all adding to the pressure of earth’s atmosphere.

Question 39

Explain how a siphon works

Answer 39

Siphons transport liquid from a higher container to a lower container by first pumping the liquid to a point in the tube where the liquid level is heavier in the tube than in the higher container and then gravity takes the liquid into the lower container.
Page 66

Question 40

Define three of the four main points on a typical graph of stress vs strain for a solid

Answer 40

The elastic limit is the maximum stress the material can sustain without being permanently deformed.

The ultimate tensile strength is the maximum stress the material can sustain without breaking.

The breaking point represents the maximum strain tolerated by the material.

Question 41

Word/math problems

41-45

Answer 41

Q