« previous next »

Author Question: Fred swings a sheet of copper in pendulum fashion between the poles of a strong magnet. The sheet ... (Read 15 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
on: Jul 29, 2018
Fred swings a sheet of copper in pendulum fashion between the poles of a strong magnet. The sheet slows in entering the magnetic field because the field
 
  A) induces swirling currents in the copper and accompanying magnetic fields that resist motion.
  B) experiences both air and magnetic friction.
  C) is repelled by free electrons in the copper.
  D) none of the above

Question 2

If you drop a bar magnet in a vertical copper pipe it will fall slowly because
 
  A) of air resistance.
  B) it induces a magnetic field in the pipe that resists motion of the magnet.
  C) the copper is a good conductor of both electricity and magnetism.
  D) of electron repulsion.


Sarahjh

  • Sr. Member
  • ****
  • Posts: 370
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

A copper-striped blue-tailed skink (Emoia impar) A copper-striped blue-tailed skink (Emoia impar)
Cuy being raised at home in the traditional Andean fashion Cuy being raised at home in the traditional Andean fashion
copper copper
The b sheet, another common secondary structure in proteins The b sheet, another common secondary structure in proteins
Nonverbal communications convey strong, powerful messages that may be negative or positive. Nonverbal communications convey strong, powerful messages that may be negative or positive.
Energy imbalance establishes a temperature gradient between the tropics and the poles Energy imbalance establishes a temperature gradient between the tropics and the poles
Video: How does an animal choose what food to eat?

For a complete list of videos, visit our video library