Physics: Principles and Problems
Physics: Principles and Problems
9th Edition
Elliott, Haase, Harper, Herzog, Margaret Zorn, Nelson, Schuler, Zitzewitz
ISBN: 9780078458132
Table of contents
Textbook solutions

All Solutions

Section 13.2: Forces Within Liquids

Exercise 17
Solution 1
Solution 2
Step 1
1 of 2
Because alcohol vaporizes easily, there is
a very noticeable evaporative cooling
effect.
Result
2 of 2
$$
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Step 1
1 of 1
Rubbing alcohol has smaller specific heat than water so it evaporates more easily and therefore it would alleviate the high fever more quickly since there is no build of hot liquid.
Exercise 18
Step 1
1 of 1
The key in making the paper clip float is to prevent the surface tension of the water from breaking. You can do this by taking another paperclip and use it as a lever to lower the paperclip gently onto the surface of the water.
Exercise 19
Solution 1
Solution 2
Step 1
1 of 2
Yes, the two terms are being used in the same context as seen in physics.
Step 2
2 of 2
Adhesive tape sticks to something besides tape. A cohesive group is a crowd of people who work together.
Step 1
1 of 1
Adhesive forces are between two different type of materials and because adhesive tape sticks to material other than itself this context is used in the same manner.

Cohesive forces are forces between the molecules of the same material so the term working as a cohesive group is used in the same context as in physics.

Exercise 20
Solution 1
Solution 2
Step 1
1 of 2
Adhesion is the force that occurs between unlike objects/materials. Alcohol has a higher adhesive attraction to the glass than mercury which is why it clings on to the surface of the glass.
Step 2
2 of 2
Cohesive forces of mercury are strong enough to overcome its adhesive force with glass eventually.
Step 1
1 of 1
Cohesive forces in alcohol are weaker than adhesive forces between alcohol and glass.

In the case of mercury it’s the other way around. Adhesive forces between mercury and glass are weaker than cohesive forces in mercury.

Exercise 21
Solution 1
Solution 2
Step 1
1 of 1
If the clip breaks through the surface of the water, it will sink. For the most part, objects that float will move back and forth with the surface.
Step 1
1 of 1
We know that paperclip wasn’t floating because it has greater density than water. It was on the surface exclusively because of surface tension. If we release the paperclip in the manner that penetrates the surface it would not come back up.
Exercise 22
Step 1
1 of 4
The concept of this is based on the concept of CONDENSATION. Let us first understand the concept of CONDENSATION and then we shall go back to the experiment to understand it.
Whether you realize it or not, there’s water in the air around you all the time. Instead of liquid water, it’s a gas called water vapor. Warmer air can hold much more water vapor than colder air.
When water vapor in the air comes into contact with something cool, such as the outside of a cold glass of lemonade, its molecules slow down and get closer together. When that happens, the gaseous water vapor turns back into liquid water droplets. That’s the concept of CONDENSATION…
Step 2
2 of 4
Now lets go t the experiment and try to understand it:
1. Beth sat with a glass of cold water.
2. Jo suggested that the water had leaked from inside to outside.
3. But it’s not so…! It’s because of the concept of CONDENSATION.
Step 3
3 of 4
An experiment to understand that the water had not leaked but the process of CONDENSATION had taken place.
Beth could weigh the glass before putting it in the refrigerator for a while to cool it down. Then she could remove it from the refrigerator and allow moisture to collect on the outside. Finally, she would weigh the glass a second time. If water simply leaks from the inside to the outside, the mass of the glass and water will be unchanged. However, if the moisture is condensation, there will be an increase in the mass at the second weighing.
Result
4 of 4
The reasoning is based on the concept of CONDENSATION.
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Chapter 1: A Physics Toolkit
Section 1.1: Mathematics and Physics
Section 1.2: Measurement
Section 1.3: Graphing Data
Page 24: Assessment
Page 29: Standardized Test Practice
Chapter 3: Accelerated Motion
Section 3.1: Acceleration
Section 3.2: Motion with Constant Acceleration
Section 3.3: Free Fall
Page 80: Assessment
Page 85: Standardized Test Practice
Chapter 4: Forces in One Dimension
Section 4.1: Force and Motion
Section 4.2: Using Newton’s Laws
Section 4.3: Interaction Forces
Page 112: Assessment
Page 117: Standardized Test Practice
Chapter 5: Forces in Two Dimensions
Section 5.1: Vectors
Section 5.2: Friction
Section 5.3: Force and Motion in Two Dimensions
Page 140: Assessment
Page 145: Standardized Test Practice
Chapter 6: Motion in Two Dimensions
Section 6.1: Projectile Motion
Section 6.2: Circular Motion
Section 6.3: Relative Velocity
Page 164: Assessment
Page 169: Standardized Test Practice
Chapter 7: Gravitation
Section 7.1: Planetary Motion and Gravitation
Section 7.2: Using the Law of Universal Gravitation
Page 190: Assessment
Page 195: Standardized Test Practice
Chapter 8: Rotational Motion
Section 8.1: Describing Rotational Motion
Section 8.2: Rotational Dynamics
Section 8.3: Equilibrium
Page 222: Assessment
Page 227: Standardized Test Practice
Chapter 9: Momentum and Its Conservation
Chapter 10: Energy, Work, and Simple Machines
Section 10.1: Energy and Work
Section 10.2: Machines
Page 278: Assessment
Page 283: Standardized Test Practice
Chapter 11: Energy and Its Conservation
Section 11.1: The Many Forms of Energy
Section 11.2: Conservation of Energy
Page 306: Assessment
Page 311: Standardized Test Practice
Chapter 13: State of Matter
Section 13.1: Properties of Fluids
Section 13.2: Forces Within Liquids
Section 13.3: Fluids at Rest and in Motion
Section 13.4: Solids
Page 368: Assessment
Page 373: Standardized Test Practice
Chapter 14: Vibrations and Waves
Section 14.1: Periodic Motion
Section 14.2: Wave Properties
Section 14.3: Wave Behavior
Page 396: Assessment
Page 401: Section Review
Chapter 15: Sound
Section 15.1: Properties of Detection of Sound
Section 15.2: The Physics of Music
Page 424: Assessment
Page 429: Standardized Test Practice
Chapter 17: Reflections and Mirrors
Section 17.1: Reflection from Plane Mirrors
Section 17.2: Curved Mirrors
Page 478: Assessment
Page 483: Standardized Test Practice
Chapter 18: Refraction and lenses
Section 18.1: Refraction of Light
Section 18.2: Convex and Concave Lenses
Section 18.3: Applications of Lenses
Page 508: Assessment
Page 513: Standardized Test Practice
Chapter 21: Electric Fields
Section 21.1: Creating and Measuring Electric Fields
Section 21.2: Applications of Electric Fields
Page 584: Assessment
Page 589: Standardized Test Practice
Chapter 22: Current Electricity
Section 22.1: Current and Circuits
Section 22.2: Using Electric Energy
Page 610: Assessment
Page 615: Standardized Test Practice
Chapter 23: Series and Parallel Circuits
Section 23.1: Simple Circuits
Section 23.2: Applications of Circuits
Page 636: Assessment
Page 641: Standardized Test Practice
Chapter 24: Magnetic Fields
Section 24.1: Magnets: Permanent and Temporary
Section 24.2: Forces Caused by Magnetic Fields
Page 664: Assessment
Page 669: Standardized Test Practice
Chapter 25: Electromagnetic Induction
Section 25.1: Electric Current from Changing Magnetic Fields
Section 25.2: Changing Magnetic Fields Induce EMF
Page 690: Assessment
Page 695: Standardized Test Practice
Chapter 30: Nuclear Physics
Section 30.1: The Nucleus
Section 30.2: Nuclear Decay and Reactions
Section 30.3: The Building Blocks of Matter
Page 828: Assessment
Page 831: Standardized Test Practice