Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 7.1, Problem 1aT
Investigate the objects that you have been given (magnets, metals, cork, plastic, wood. Etc.).
Separate the objects into three classes based on their interactions with each other.
-
1. List the objects in each of your classes.
Class 1 Class 1 Class 1
2. Fill out the table below with a word or two describing the interaction between members of the same and different classes.
3. Are all metals in the same class?
4. To which class do magnets belong? Are all the objects in this class magnets?
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Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true
1 Gravity is the weakest of the four fundamental forces.
2. Gravity and magnetism are examples of contact forces.
3. If the distance between Earth and an object increases by three, the gravitational force on the object will be
one-sixth its original strength.
4. On Earth, the magnitude of g varies with longitude and altitude.
5. Newton's first law of motion states that an object will continue either being at rest or moving at constant
velocity unless acted upon by an external non-zero net force.
6 According to Newton's second law of motion, acceleration and force have a(n) directly proportional
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8 According to Newton's second law, an object will accelerate in the direction of the non-zero net…
1. Will two neutral objects experience an electrical interaction? What is your evidence?
2. Describe how an insulator can acquire a charge.
Describe what is the cause of the magnetic field of the Earth. Describe what is meant by magnetic field strength and state its unit of
measurement.
Select one or more:
а.
The magnetic field of the earth is caused by Earth's rotation around the Sun.
b.
The magnetic field strength B is the value of the current in the loop per unit area.
c. Magnetic field strength is measured in amperes per meter squared.
d.
The magnetic field strength B is defined as the force acting per unit current in a wire of unit length when the wire is perpendicular to the
magnetic field lines.
e. Magnetic field strength is measured in Tesla.
f. The magnetic field of the earth is caused by electric currents inside the molten iron core of the Earth.
Chapter 7 Solutions
Tutorials in Introductory Physics
Ch. 7.1 - Investigate the objects that you have been given...Ch. 7.1 - Obtain a permanent magnet and an object that is...Ch. 7.1 - The parts of a permanent magnet that interact most...Ch. 7.2 - On an enlargement of the figure below, sketch...Ch. 7.2 - B. Make prediction for the following five...Ch. 7.2 - Suppose you place a small magnet in a magnetic...Ch. 7.2 - B. Suppose you hold a magnetic compass near a...Ch. 7.2 - Now suppose that you hold the compass at some...Ch. 7.2 - Sketch the magnetic field lines of a...Ch. 7.2 - A wire is formed into a and the leads are twisted...
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