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 84 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

Sarahjh

  • Member
  • Posts: 370
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Triangle Triangle
Warming friction created with a sawing motion (i.e., ulnar friction). The ulnar sides of the hands ... Warming friction created with a sawing motion (i.e., ulnar friction). The ulnar sides of the hands ...
Apply effleurage to both sides of the upper trapezius using loose fists. When moving laterally, ... Apply effleurage to both sides of the upper trapezius using loose fists. When moving laterally, ...
An aqueous solution has a normal boiling point of 103.0C. What is the freezing point of this ... An aqueous solution has a normal boiling point of 103.0C. What is the freezing point of this ...
Cut the figure into two identical parts Cut the figure into two identical parts
Summary of the effects on transcription levels of different point mutations Summary of the effects on transcription levels of different point mutations
Video: Medullary osmotic gradient - influencing factors

For a complete list of videos, visit our video library