« previous next »

Author Question: Two stars, Betty and Wilma, are both on the main sequence. Betty is more luminous than Wilma. ... (Read 69 times)

Awilson837

  • Hero Member
  • *****
  • Posts: 509
on: Jul 27, 2018
Two stars, Betty and Wilma, are both on the main sequence. Betty is more luminous than Wilma.
 
  Which one has a hotter surface temperature? Which one is more massive? Which one is bigger? If they both formed at the same time, which one will evolve off the main sequence first?

Question 2

Process of Science: What evidence is there of a subsurface ocean on Europa? Do you find it compelling?
 
  What will be an ideal response?


joneynes

  • Sr. Member
  • ****
  • Posts: 376
Reply #1 on: Jul 27, 2018
Answer to Question 1

Since they are both on the main sequence but Betty is more luminous than Wilma, Betty must be located higher up on the main sequence. Therefore, Betty has a hotter surface temperature, is more massive, and has a larger radius. Betty will also evolve faster than Wilma, and if they were formed at the same time Betty will turn off the main sequence first.

Answer to Question 2

The main evidence comes from trying to find a mechanism to explain Europa's magnetic field variation. It appears to be due to an induced field, possibly from a conducting substance, such as a salty subsurface ocean.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Plotting the Ages of Stars Plotting the Ages of Stars
RNA base sequence of the trp leader region RNA base sequence of the trp leader region
Deforestation is one of the main sources of greenhouse gas emissions Deforestation is one of the main sources of greenhouse gas emissions
The Main Macromolecules in Cells The Main Macromolecules in Cells
8.The following table contains DNA-sequence information compiled by Marilyn Kozak (1987). The ... 8.The following table contains DNA-sequence information compiled by Marilyn Kozak (1987). The ...
Main mechanism of carbon dioxide transport and exchange. A lesser amount of CO2 travels to the lungs Main mechanism of carbon dioxide transport and exchange. A lesser amount of CO2 travels to the lungs
Video: Enzyme structure - Properties of enzymes

For a complete list of videos, visit our video library