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

Author Question: On the scale of the cosmic calendar, in which the history of the universe is compressed to 1 year, ... (Read 43 times)

altibaby

  • Hero Member
  • *****
  • Posts: 562
on: Jul 27, 2018
On the scale of the cosmic calendar, in which the history of the universe is compressed to 1 year, how long has human civilization (i.e., since ancient Egypt) existed?
 
  A) a few seconds
  B) about a month
  C) less than a millionth of a second
  D) a few hours
  E) about half the year

Question 2

How many galaxies are there in the observable universe?
 
  A) about as many as the number of stars we see in the sky with our naked eyes
  B) infinity
  C) roughly a thousand times more than the number of stars in our galaxy
  D) roughly (within a factor of 10 ) the same as the number of stars in our galaxy
  E) about as many as the number of grains of sand on all the beaches on Earth


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

millet

  • Sr. Member
  • ****
  • Posts: 354
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

D


altibaby

  • Member
  • Posts: 562
Reply 2 on: Jul 27, 2018
:D TYSM

meganmoser117

  • Member
  • Posts: 303
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Changes in boreal forest composition along a chronosequence in Quebec. Dates refer to the year of th Changes in boreal forest composition along a chronosequence in Quebec. Dates refer to the year of th
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
A 5,000-year-old Egyptian garment A 5,000-year-old Egyptian garment
The year 2010 was the hottest since 1880 The year 2010 was the hottest since 1880
Four-point scale for grading edema Four-point scale for grading edema
History History
Video: Major Elements in Biological Molecules: Nucleic acids

For a complete list of videos, visit our video library