Author Question: The Hubble time is expressed as A) H D. B) D/v. C) 1/H. D) H T. E) the critical ... (Read 9 times)

CQXA

  • Hero Member
  • *****
  • Posts: 546
The Hubble time is expressed as
 
  A) H  D.
  B) D/v.
  C) 1/H.
  D) H  T.
  E) the critical density/H.

Question 2

According to Kepler's Second Law of planetary motion, a planet moves fastest in its orbit when it is
 
  A) undergoing retrograde motion
  B) in between perihelion and aphelion
  C) at perihelion
  D) at aphelion



whitcassie

  • Sr. Member
  • ****
  • Posts: 298
Answer to Question 1

C

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

For a complete list of videos, visit our video library