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

Author Question: What two observable properties of a Cepheid variable are directly related to one another? A) its ... (Read 56 times)

oliviahorn72

  • Hero Member
  • *****
  • Posts: 579
on: Jul 27, 2018
What two observable properties of a Cepheid variable are directly related to one another?
 
  A) its luminosity and its mass
  B) the period between its peaks of brightness and its distance
  C) the period between its peaks of brightness and its luminosity
  D) its mass and its distance

Question 2

Einstein originally added a cosmological constant to his equations to prevent a presumably static universe from either contracting or expanding.
 
  Modern cosmologists have reintroduced it to their equations, where as the source of dark energy it causes the universe to expand ever faster.
 
 
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

livaneabi

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

TRUE


oliviahorn72

  • Hero Member
  • *****
  • Posts: 579
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


livaneabi

  • Sr. Member
  • ****
  • Posts: 328
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Pupil Assessment, Move Penlight directly in Front of Pupil Pupil Assessment, Move Penlight directly in Front of Pupil
The salivary glands and related structures of the oral cavity. The salivary glands and related structures of the oral cavity.
A gasoline direct-injection system injects fuel under high pressure directly into the combustion ... A gasoline direct-injection system injects fuel under high pressure directly into the combustion ...
Dental Related Adverse Effects in Patients Undergoing Cancer Treatment Dental Related Adverse Effects in Patients Undergoing Cancer Treatment
Liquid Water Properties compared with n-pentane, nonpolar, non-hydrogen bonding liquid Liquid Water Properties compared with n-pentane, nonpolar, non-hydrogen bonding liquid
Properties of Bacterial DNA Polymerases I, II, and III Properties of Bacterial DNA Polymerases I, II, and III
Video: Mutations and translation

For a complete list of videos, visit our video library