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

Author Question: About how long ago was the last retreat of the glaciers from North America and Europe? a. 60,000 ... (Read 63 times)

armygirl

  • Hero Member
  • *****
  • Posts: 556
on: Jul 28, 2018
About how long ago was the last retreat of the glaciers from North America and Europe?
 a. 60,000 years
  b. 10,000 years
  c. 2 million years
  d. 6000 years

Question 2

Consider two charged spheres, one with charge +2 C and the other with -2 C. A proton (a positively charged particle) is at the point halfway between the spheres. What is not zero?
 a. the potential energy of the proton
  b. the work to move the proton from infinity to that point
  c. the force on the proton
  d. all of the three above are zero


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Kjones0604

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

C


armygirl

  • Hero Member
  • *****
  • Posts: 556
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


Kjones0604

  • Sr. Member
  • ****
  • Posts: 327
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Anopheles larva from southern Germany, about 8 mm long Anopheles larva from southern Germany, about 8 mm long
Extinct North American Megafauna Extinct North American Megafauna
Components of a long bone. The entire long bone is on the left side accompanied by a blowup of the p Components of a long bone. The entire long bone is on the left side accompanied by a blowup of the p
Spain’s North American Frontier, c. 1750 Spain’s North American Frontier, c. 1750
Seven black members of Congress in 1871 are from left to right: Senator Hiram Revels (R-MS) and Repr Seven black members of Congress in 1871 are from left to right: Senator Hiram Revels (R-MS) and Repr
Homeschooling has come a long way. These children are performing in a musical at the annual ... Homeschooling has come a long way. These children are performing in a musical at the annual ...
Video: Virtual Tour of the Heart

For a complete list of videos, visit our video library