« previous next »

Author Question: If a star has a parallax of 0.05, then its distance in light-years is about A) 6.4 light-years. ... (Read 222 times)

fnuegbu

  • Hero Member
  • *****
  • Posts: 539
on: Jul 27, 2018
If a star has a parallax of 0.05, then its distance in light-years is about
 
  A) 6.4 light-years.
  B) 12.7 light-years.
  C) 20 light-years.
  D) 65 light-years.
  E) 100 light-years.

Question 2

How is a technical civilization defined?
 
  A) a civilization that can avoid self-destruction for long periods
  B) a civilization that can communicate over interstellar distances
  C) a civilization that has the ability to store and process information
  D) a civilization that has developed interplanetary space travel
  E) a civilization that can construct tools out of raw materials


welcom1000

  • Sr. Member
  • ****
  • Posts: 298
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

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.

Absorption of light energy by an electron Absorption of light energy by an electron
False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth. False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth.
During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage, During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage,
Prevalence of drug use in the United States. Figures are based on a survey of people 12 years of age ... Prevalence of drug use in the United States. Figures are based on a survey of people 12 years of age ...
Interactions of Light and Matter Interactions of Light and Matter
Mottled Sea Star (Evasterias troschelii) eating a clam, Alaska. Mottled Sea Star (Evasterias troschelii) eating a clam, Alaska.
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

For a complete list of videos, visit our video library