This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Identical point charges (+20 mC) are placed at the corners of an equilateral triangle with sides of ... (Read 115 times)

karen

  • Hero Member
  • *****
  • Posts: 537
on: Jul 28, 2018
Identical point charges (+20 mC) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45 mC from infinity to the midpoint of one side of the triangle?
 a. 26 J
  b. 16 J
  c. 23 J
  d. 21 J
  e. 12 J

Question 2

A charge of +3.0 mC is distributed uniformly along the circumference of a circle with a radius of 20 cm. How much external energy is required to bring a charge of 25mC from infinity to the center of the circle?
 a. 5.4 J
  b. 3.4 J
  c. 4.3 J
  d. 2.7 J
  e. 6.8 J


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

juiceman1987

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

B


karen

  • Member
  • Posts: 537
Reply 2 on: Jul 28, 2018
:D TYSM

bimper21

  • Member
  • Posts: 309
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a
The leaky-barrel model: a settling-point model of eating and body weight homeostasis. The leaky-barrel model: a settling-point model of eating and body weight homeostasis.
Common trigger point locations, anterior and posterior. Common trigger point locations, anterior and posterior.
Solve Trig Triangle Part 2 Solve Trig Triangle Part 2
A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ... A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ...
A genetic map showing the location of revertible (point) mutants of the rll region A genetic map showing the location of revertible (point) mutants of the rll region
Video: Structures that affect circulation - heart and MABP

For a complete list of videos, visit our video library