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

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 134 times)

crobinson2013

  • Hero Member
  • *****
  • Posts: 535
on: Jul 28, 2018
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
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

A


crobinson2013

  • Hero Member
  • *****
  • Posts: 535
Reply #2 on: Jul 28, 2018
TY


vickyvicksss

  • Sr. Member
  • ****
  • Posts: 351
Reply #3 on: Jul 28, 2018
You're welcome


« previous next »
 

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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.

Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int
Volcanic plateaus (red) and impact basins (blue) dominate this topographic map of Mars Volcanic plateaus (red) and impact basins (blue) dominate this topographic map of Mars
Nursing diagnosis impact on nursing practice Nursing diagnosis impact on nursing practice
Correlates well with global temperature prior to the impact of GHG emissions Correlates well with global temperature prior to the impact of GHG emissions
Formation of an Impact Crater Formation of an Impact Crater
The diagonal of the floor of a rectangular office cubicle is 2 ft longer than the ... The diagonal of the floor of a rectangular office cubicle is 2 ft longer than the ...
Video: A Human Karyotype Preparation Animation

For a complete list of videos, visit our video library