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

Author Question: Henrietta Leavitt discovered the period-luminosity relationship for ____________________. Fill in ... (Read 67 times)

jessicacav

  • Hero Member
  • *****
  • Posts: 558
on: Jul 27, 2018
Henrietta Leavitt discovered the period-luminosity relationship for ___________________ _.
 
  Fill in the blank(s) with correct word

Question 2

As a star begin to form the initial energy source is from
 
  a. nuclear fusion.
  b. nuclear fission.
  c. gravitational potential energy.
  d. magnetic fields.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ksanderson1296

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 27, 2018
Answer to Question 1

Cepheid variables

Answer to Question 2

c


jessicacav

  • Member
  • Posts: 558
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

epscape

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

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.

Leaf structure and its relationship to the C4 cycle Leaf structure and its relationship to the C4 cycle
Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period
Embryonic Period Embryonic Period
Embryonic Period Embryonic Period
Digital illustration of a fish that was believed to have become extinct during the Cretaceous Period Digital illustration of a fish that was believed to have become extinct during the Cretaceous Period
Recently discovered members of the deep pelagic community Recently discovered members of the deep pelagic community
Video: PET Scan Animation

For a complete list of videos, visit our video library