« previous next »

Author Question: Why was Copernicus' model much simpler than Ptolemy's? What will be an ideal ... (Read 83 times)

Beheh

  • Hero Member
  • *****
  • Posts: 520
on: Jul 27, 2018
Why was Copernicus' model much simpler than Ptolemy's?
 
  What will be an ideal response?

Question 2

Two separate pairs of binary stars are observed. The separation of the pairs is identical, but the orbital period of Pair X is 4 times the orbital period of Pair Y.
 
  How does the total mass of the stars in Pair X compare to the total mass of the stars in Pair Y?
  A) Pair X has a total mass 2 times greater than Pair Y.
  B) Pair Y has a total mass 2 times greater than Pair X.
  C) Pair Y has a total mass 16 times greater than Pair X.
  D) Pair X has a total mass 16 times greater than Pair Y.


k2629

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Jul 27, 2018
Answer to Question 1

To duplicate retrograde motion, Copernicus merely had the planets lapping each other as they revolved around the Sun at varying speeds. Ptolemy needed a complex set of deferents and epicycles to explain retrograde motion in his geocentric model.

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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.

This modified model of Easton’s systems theory puts government decision makers as the source of pol This modified model of Easton’s systems theory puts government decision makers as the source of pol
A Simple Model of the Learning Process A Simple Model of the Learning Process
The Murphy–Moller wellness model. The Murphy–Moller wellness model.
Diathesis–stress model of depression. Diathesis–stress model of depression.
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately
The epigenetic stem cell model proposes that both epigenetic changes The epigenetic stem cell model proposes that both epigenetic changes
Video: Brief Summary on Photosynthesis - Animation

For a complete list of videos, visit our video library