This topic contains a solution. Click here to go to the answer

Author Question: Alex throws a 0.43-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 ... (Read 183 times)

crobinson2013

  • Hero Member
  • *****
  • Posts: 535
Alex throws a 0.43-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 m/s, and just after is 5.5 m/s. What is the magnitude of the change in the ball's momentum?
 a. 0.09 kgm/s
  c. 4.3 kgm/s
  b. 1.0 kgm/s
  d. 5.2 kgm/s

Question 2

Two identical iron spheres have equal positive charges and the force between them when they are 1 m apart is 4 N. What percentage of the electrons has been removed from each sphere if each sphere has 1 mole (6  1023) of iron atoms? (ke = 8.99  109 Nm2/C2, the atomic number of iron is 26, and the electron charge is -1.6  10-19 C)
 a. 8  10-10
  c. 0.001
  b. 0.000002
  d. 4  10-10



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vickyvicksss

  • Sr. Member
  • ****
  • Posts: 351
Answer to Question 1

D

Answer to Question 2

A





 

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

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.

For a complete list of videos, visit our video library