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

Author Question: A sound with a frequency of 25 kHz is in the ______________ region of the sound spectrum. a. ... (Read 75 times)

theo

  • Hero Member
  • *****
  • Posts: 698
on: Jul 28, 2018
A sound with a frequency of 25 kHz is in the ______________ region of the sound spectrum.
 a. infrasonic
  b. ultrasonic
  c. audible
  d. visible

Question 2

An energy band in a solid consists of
 a. an infinite number of levels, with each level corresponding to a point in a box.
  b. a large number of energy levels so closely spaced that they may be regarded as a continuous band.
  c. an infinite number of wave functions, with each wave function corresponding to a point in a box.
  d. a large number of electrons so closely spaced that they may be regarded as a continuous band of electric charge.
  e. an infinite number of electrons, with each electron corresponding to a point in a box.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Amiracle

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

b


theo

  • Hero Member
  • *****
  • Posts: 698
Reply #2 on: Jul 28, 2018
Thank you!


Amiracle

  • Sr. Member
  • ****
  • Posts: 334
Reply #3 on: Jul 28, 2018
Always glad to help...


« previous next »
 

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

The Spinal Cord, The Spinal Cord and Spinal Nerves; Close-up of the Caudal Region of the Spinal Nerv The Spinal Cord, The Spinal Cord and Spinal Nerves; Close-up of the Caudal Region of the Spinal Nerv
The Electromagnetic Spectrum The Electromagnetic Spectrum
Physical and Perceptual Dimensions of Sound Waves Physical and Perceptual Dimensions of Sound Waves
The clinical division of the abdominal region into quadrants with related organs and structures. The clinical division of the abdominal region into quadrants with related organs and structures.
The Electromagnetic Spectrum The Electromagnetic Spectrum
The frequency of aneuploidy changes dramatically over developmental time. Between 6 to 8 weeks and 2 The frequency of aneuploidy changes dramatically over developmental time. Between 6 to 8 weeks and 2
Video: Chemical Equilibrium between N2O4 (colorless gas) and NO2 (brown gas)

For a complete list of videos, visit our video library