Author Question: What key event happened during the decoupling epoch? A) Pairs of neutrons and protons were ... (Read 54 times)

Wadzanai

  • Hero Member
  • *****
  • Posts: 528
What key event happened during the decoupling epoch?
 
  A) Pairs of neutrons and protons were created.
  B) Electrons and positrons were created.
  C) Expansion cooled the universe enough that protons could capture electrons in orbit.
  D) Dark energy accelerated the cosmos on to infinity.
  E) The universe underwent a brief period of very rapid expansion.

Question 2

Mars' mass is only a tenth of the Earth's, and its density is also less than the Earth's.
 
  Indicate whether the statement is true or false



fraziera112

  • Sr. Member
  • ****
  • Posts: 356
Answer to Question 1

C

Answer to Question 2

TRUE



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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.

For a complete list of videos, visit our video library