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 237 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
Wow, this really help

Animal_Goddess

  • Member
  • Posts: 339
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Triangle plot showing gene expression related to xylem, phloem, and nonvascular tissue in Arabidopsi Triangle plot showing gene expression related to xylem, phloem, and nonvascular tissue in Arabidopsi
Table of Ionic Charges Table of Ionic Charges
Label the cutbank and point bar on this image. Label the cutbank and point bar on this image.
Einthoven’s triangle. Einthoven’s triangle.
Use two hands to squeeze both sides of the arm at the same time. Apply from shoulder to wrist. ... Use two hands to squeeze both sides of the arm at the same time. Apply from shoulder to wrist. ...
Reach from behind to apply circular friction to the temples on both sides. Reach from behind to apply circular friction to the temples on both sides.
Video: Cellular slime mold life cycle Animation

For a complete list of videos, visit our video library