Author Question: The Hubble time is expressed as A) H D. B) D/v. C) 1/H. D) H T. E) the critical ... (Read 89 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?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

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.

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?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

For a complete list of videos, visit our video library