Author Question: The speed of waves on a thin wire is 150 m/s. The density of the material that the wire is made of ... (Read 85 times)

daltonest1984

  • Hero Member
  • *****
  • Posts: 536
The speed of waves on a thin wire is 150 m/s. The density of the material that the wire is made of is 5000 kg/m3. The wire has a 0.500 mm diameter circular crosssection. What is the tension that the wire is under?
 
  A)
 
  76.2 N
 
  B)
 
  22.1 N
 
  C)
 
  88.4 N
 
  D)
 
  0.147 N
 
  E)
 
  56.7 N

Question 2

A solenoid of inductance L = 50 mH has a magnetic energy U = 3 x 10-4 J with a density u = 0.0042 J/ m3. What is the winding density n of the solenoid?
 
  A)
 
  58 turns/m
  B)
 
  1584 turns/m
  C)
 
  1200 turns/m
  D)
 
  234 turns/m
  E)
 
  746 turns/m



yuyiding

  • Sr. Member
  • ****
  • Posts: 357
Answer to Question 1

B

Answer to Question 2

E



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

For a complete list of videos, visit our video library