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What is the internal energy of a system consisting of two point charges, one 2.0 µC, and the other −3.0 µC, placed 1.2 m away from each other?
- −3.8×10
-2 J
- −4.5×10
-2 J
- 4.5×10
-2 J
- 3.8×10
-2 J
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A system of three point charges has a 1.00 µC charge at the origin, a −2.00 µC charge at
x =30 cm, and a 3.00 µC charge at
x =70 cm. What is the total stored potential energy of this configuration?
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A system has 2.00 µC charges at (50 cm, 0) and (−50 cm, 0) and a −1.00 µC charge at (0, 70 cm). As the
y -coordinate of the −1.00 µC charge increases, the potential energy ___. As the
y -coordinate of the −1.00 µC charge decreases, the potential energy ___.
- increases, increases
- increases, decreases
- decreases, increases
- decreases, decreases
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A system of three point charges has a 1.00 µC charge at the origin, a −2.00 µC charge at
x =30 cm, and a 3.00 µC charge at
x =70 cm. What happens to the total potential energy of this system if the −2.00 µC charge and the 3.00 µC charge trade places?
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Take a square configuration of point charges, two positive and two negative, all of the same magnitude, with like charges sharing diagonals. What will happen to the internal energy of this system if one of the negative charges becomes a positive charge of the same magnitude?
- increase
- decrease
- no change
- not enough information
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Take a square configuration of point charges, two positive and two negative, all of the same magnitude, with like charges sharing diagonals. What will happen to the internal energy of this system if the sides of the square decrease in length?
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A system has 2.00 µC charges at (50 cm, 0) and (−50 cm, 0) and a −1.00 µC charge at (0, 70 cm), with a velocity in the –
y -direction. When the −1.00 µC charge is at (0, 0) the potential energy is at a ___ and the kinetic energy is ___.
- maximum, maximum
- maximum, minimum
- minimum, maximum
- minimum, minimum
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Section summary
Conceptual questions
If the voltage between two points is zero, can a test charge be moved between them with zero net work being done? Can this necessarily be done without exerting a force? Explain.
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Questions & Answers
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Step 2: Find each score's deviation from the mean. ...
Step 3: Square each deviation from the mean. ...
Step 4: Find the sum of squares. ...
Step 5: Divide the sum of squares by n – 1 or N.
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Bhartdarshan' is an internet-based travel agency wherein customer can see videos of the cities they plant to visit. The number of hits daily is a normally distributed random variable with a mean of 10,000 and a standard deviation of 2,400
a. what is the probability of getting more than 12,000 hits?
b. what is the probability of getting fewer than 9,000 hits?
Bhartdarshan'is an internet-based travel agency wherein customer can see videos of the cities they plan to visit. The number of hits daily is a normally distributed random variable with a mean of 10,000 and a standard deviation of 2,400.
a. What is the probability of getting more than 12,000 hits
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Sorry i want to learn more about this question
Bright
a= 0.20233
b=0.3384
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It depends on your business problem or in Machine Learning you could use ROC- AUC cruve to decide the threshold value
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Source:
OpenStax, College physics for ap® courses. OpenStax CNX. Nov 04, 2016 Download for free at https://legacy.cnx.org/content/col11844/1.14
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