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

Author Question: Identical point charges (+20 C) are placed at the corners of an equilateral triangle with sides of ... (Read 312 times)

pepyto

  • Hero Member
  • *****
  • Posts: 547
on: Jul 28, 2018
Identical point charges (+20 C) 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 C 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 C 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 25C 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

SeanoH09

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 28, 2018
Answer to Question 1

d

Answer to Question 2

b


pepyto

  • Hero Member
  • *****
  • Posts: 547
Reply #2 on: Jul 28, 2018
Thank you!


SeanoH09

  • Sr. Member
  • ****
  • Posts: 323
Reply #3 on: Jul 28, 2018
Always glad to help...


« previous next »
 

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Acromegaly in one individual from a pair of identical twins. Acromegaly in one individual from a pair of identical twins.
How to Solve an Ambiguous Case Triangle How to Solve an Ambiguous Case Triangle
Finish with effleurage and passive touch. Apply effleurage to both sides simultaneously, starting at ... Finish with effleurage and passive touch. Apply effleurage to both sides simultaneously, starting at ...
. Calculate the net electric field at point B . Calculate the net electric field at point B
Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ... Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ...
Emerson’s Three-Point Test-Cross Analysis Emerson’s Three-Point Test-Cross Analysis
Video: Bone tissue types - compact and spongy

For a complete list of videos, visit our video library