This topic contains a solution. Click here to go to the answer

Author Question: Light can travel to Earth from a distant star, but sound cannot. Why is this? a. Light is an ... (Read 91 times)

wrbasek0

  • Hero Member
  • *****
  • Posts: 560
Light can travel to Earth from a distant star, but sound cannot. Why is this?
 a. Light is an electromagnetic wave, and sound requires a medium.
  b. The Sun does not make sound.
  c. Light is a longitudinal wave, and sound is a transverse wave.
  d. The statement is false; both light and sound can travel in empty space.

Question 2

The number of states in the He+ ion corresponding to the principle quantum number n = 5 are
 a. 18
  b. 25
  c. 50
  d. 9
  e. 11



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

upturnedfurball

  • Sr. Member
  • ****
  • Posts: 334
Answer to Question 1

a

Answer to Question 2

c




wrbasek0

  • Member
  • Posts: 560
Reply 2 on: Jul 28, 2018
:D TYSM


komodo7

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Excellent

 

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?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Everyone has one nostril that is larger than the other.

For a complete list of videos, visit our video library