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

Author Question: Light can travel to Earth from a distant star, but sound cannot. Why is this? a. Light is an ... (Read 52 times)

wrbasek0

  • Hero Member
  • *****
  • Posts: 560
on: Jul 28, 2018
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
Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

c


wrbasek0

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

frankwu0507

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Micrographs of nerve cells taken with different types of light microscopes. Micrographs of nerve cells taken with different types of light microscopes.
Tiny 'Spherules' Reveal Details About Earth's Asteroid Impacts Tiny 'Spherules' Reveal Details About Earth's Asteroid Impacts
Artist's conception of the birth of a star within a dense molecular cloud. Artist's conception of the birth of a star within a dense molecular cloud.
Responses to Sound Waves Responses to Sound Waves
Characteristics of Sound: Frequency and Amplitude Characteristics of Sound: Frequency and Amplitude
Earth 600 Million Years Ago Earth 600 Million Years Ago
Video: Natural Selection, Species Isolation and Real World Example

For a complete list of videos, visit our video library