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 80 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 Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

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?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Rubber Vine Rubber Vine
In 1879 an army officer founded the Carlisle School in Pennsylvania to “civilize” young Indians. The In 1879 an army officer founded the Carlisle School in Pennsylvania to “civilize” young Indians. The
A rapidly vibrating needle at idle that becomes steady as engine speed is increased indicates worn ... A rapidly vibrating needle at idle that becomes steady as engine speed is increased indicates worn ...
The Russians planted a flag on the sea floor beneath the North Pole The Russians planted a flag on the sea floor beneath the North Pole
The Impact of Cross-Ethnic Friendships on Minority Students’ Well-Being The Impact of Cross-Ethnic Friendships on Minority Students’ Well-Being
Ethanol has the molecular formula C2H6O. Which ball and stick model shown above represents ... Ethanol has the molecular formula C2H6O. Which ball and stick model shown above represents ...
Video: Hydrogen bonds - role in the body

For a complete list of videos, visit our video library