« previous next »

Author Question: A SETI search using the 300-meter diameter Arecibo radio telescope can pick up a 10 million Watt at ... (Read 75 times)

sheilaspns

  • Hero Member
  • *****
  • Posts: 567
on: Jul 27, 2018
A SETI search using the 300-meter diameter Arecibo radio telescope can pick up a 10 million Watt at a distance of 1,000 light-years.
 
  If we were to detect a similar signal coming from 10,000 light-years away, how powerful would the alien antenna have to be? A) 1 billion Watts
  B) 10 million Watts
  C) 10 billion Watts
  D) 100 million Watts

Question 2

In the periodic table of elements, members of each ________ have similar chemical properties.
 
  A) period
  B) row
  C) group
  D) transition


bigcheese9

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

sheilaspns

  • Hero Member
  • *****
  • Posts: 567
Reply #2 on: Jul 27, 2018
Thanks


bigcheese9

  • Sr. Member
  • ****
  • Posts: 333
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Elephants do not fully digest their food. Other animals, such as this Baboon may pick through elepha Elephants do not fully digest their food. Other animals, such as this Baboon may pick through elepha
Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Distribution of Thunderstorms: Approximately 14.5 million thunderstorms occur each year across the ... Distribution of Thunderstorms: Approximately 14.5 million thunderstorms occur each year across the ...
Telescope Telescope
A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ... A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ...
Telescope Telescope
Video: Osteoporosis

For a complete list of videos, visit our video library