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- University physics volume 2
- Unit 2. electricity and magnetism
- Electric charges and fields
- Coulomb's law
In a salt crystal, the distance between adjacent sodium and chloride ions is
What is the force of attraction between the two singly charged ions?
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Suppose Earth and the Moon each carried a net negative charge −
Q . Approximate both bodies as point masses and point charges.
(a) What value of
Q is required to balance the gravitational attraction between Earth and the Moon?
(b) Does the distance between Earth and the Moon affect your answer? Explain.
(c) How many electrons would be needed to produce this charge?
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Two small balls, each of mass 5.0 g, are attached to silk threads 50 cm long, which are in turn tied to the same point on the ceiling, as shown below. When the balls are given the same charge
Q , the threads hang at
to the vertical, as shown below. What is the magnitude of
Q ? What are the signs of the two charges?
The tension is
. The horizontal component of the tension is
.
The charges can be positive or negative, but both have to be the same sign.
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Point charges
and
are located at
and
. What is the force of
on
?
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The net excess charge on two small spheres (small enough to be treated as point charges) is
Q . Show that the force of repulsion between the spheres is greatest when each sphere has an excess charge
Q /2. Assume that the distance between the spheres is so large compared with their radii that the spheres can be treated as point charges.
Let the charge on one of the spheres be
rQ , where
r is a fraction between 0 and 1. In the numerator of Coulomb’s law, the term involving the charges is
This is equal to
. Finding the maximum of this term gives
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Two small, identical conducting spheres repel each other with a force of 0.050 N when they are 0.25 m apart. After a conducting wire is connected between the spheres and then removed, they repel each other with a force of 0.060 N. What is the original charge on each sphere?
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A charge
is placed at the point
P shown below. What is the force on
q ?
Define right to be the positive direction and hence left is the negative direction, then
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Two fixed particles, each of charge
are 24 cm apart. What force do they exert on a third particle of charge
that is 13 cm from each of them?
The particles form triangle of sides 13, 13, and 24 cm. The
x -components cancel, whereas there is a contribution to the
y -component from both charges 24 cm apart. The
y -axis passing through the third charge bisects the 24-cm line, creating two right triangles of sides 5, 12, and 13 cm.
in the negative
y -direction since the force is attractive. The net force from both charges is
.
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The charges
and
are placed at the corners of the triangle shown below. What is the force on
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What is the force on the charge
q at the lower-right-hand corner of the square shown here?
The diagonal is
and the components of the force due to the diagonal charge has a factor
;
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Point charges
and
are fixed at
and
What is the force of
?
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Questions & Answers
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what is defense mechanisms
Chinaza
I'm interested in biological psychology and cognitive psychology
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How can I develope my cognitive domain
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Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
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miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
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Wekolamo
because it helps many people around the world to understand how to interact with other people and understand them well, for example at work (job).
Agreed 👍 There are many parts of our brains and behaviors, we really need to get to know. Blessings for everyone and happy Sunday!
ARC
A child is a member of community not society elucidate ?
Isn't practices worldwide, be it psychology, be it science. isn't much just a false belief of control over something the mind cannot truly comprehend?
compare and contrast skinner's perspective on personality development on freud
Skinner skipped the whole unconscious phenomenon and rather emphasized on classical conditioning
war
explain how nature and nurture affect the development and later the productivity of an individual.
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
and having a good philosophy of the world is like a sandwich and a peanut butter 👍
Jonathan
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Source:
OpenStax, University physics volume 2. OpenStax CNX. Oct 06, 2016 Download for free at http://cnx.org/content/col12074/1.3
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