« previous next »

Author Question: Two point charges of +20.0 C and -8.00 C are separated by a distance of 20.0 cm. What is the ... (Read 47 times)

BrownTown3

  • Hero Member
  • *****
  • Posts: 564
on: Jul 29, 2018
Two point charges of +20.0 C and -8.00 C are separated by a distance of 20.0 cm. What is the magnitude of electric field due to these charges at a point midway between them? (k = 1/40 = 8.99  109 N  m2/C2)
 
  A) 25.2  106 N/C directed toward the negative charge
  B) 25.2  106 N/C directed toward the positive charge
  C) 25.2  105 N/C directed toward the negative charge
  D) 25.2  105 N/C directed toward the positive charge
  E) 25.2  104 N/C directed toward the negative charge

Question 2

A rod has a length 2.00000 m at 10.0C. The length of the rod increases to 2.00060 m when the temperature increases to 30.0C. What is the coefficient of linear expansion of the material from which the rod is made?
 
  A) 1.5  10-5/K
  B) 1.0  10-5/K
  C) 1.0  10-3/K
  D) 2.5  10-5/K
  E) 2.0  10-5/K


krakiolit

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

BrownTown3

  • Hero Member
  • *****
  • Posts: 564
Reply #2 on: Jul 29, 2018
Thanks


krakiolit

  • Sr. Member
  • ****
  • Posts: 318
Reply #3 on: Jul 29, 2018
Welcome :)


« previous next »
 

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?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period
Decimal Point Place Values Decimal Point Place Values
How to find the equation of a line that is perpendicular to a line passing through a point How to find the equation of a line that is perpendicular to a line passing through a point
Decimal Values as They Relate to the Location of the Decimal Point Decimal Values as They Relate to the Location of the Decimal Point
What is the freezing point of a solution of 2.86 g MgCl2 in 100 g of water? Kf for water is ... What is the freezing point of a solution of 2.86 g MgCl2 in 100 g of water? Kf for water is ...
An agarose gel containing separated DNA fragments stained with the DNA-binding dye An agarose gel containing separated DNA fragments stained with the DNA-binding dye
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library