Author Question: A train is traveling away from you at 120 km/h. It blows its whistle, and you hear a tone of 0.400 ... (Read 86 times)

Melani1276

  • Hero Member
  • *****
  • Posts: 516
A train is traveling away from you at 120 km/h. It blows its whistle, and you hear a tone of 0.400 kHz. Take the speed of sound to be 340 m/s. What frequency does the whistle actually produce?
 
  A) 444 Hz
  B) 439 Hz
  C) 364 Hz
  D) 361 Hz

Question 2

A conductor is placed in a steady external electric field. Which of the following statements are correct for this situation? (There could be more than one correct choice.)
 
  A) The electric field is zero inside the conductor.
  B) All the free electrons go to the surface of the conductor.
  C) The surface of the conductor is neutral.
  D) The electric field just outside the surface of the conductor is perpendicular to the surface.
  E) None of the above statements are correct.


joewallace

  • Sr. Member
  • ****
  • Posts: 337
Answer to Question 1

B

Answer to Question 2

A, B, D



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

For a complete list of videos, visit our video library