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

Author Question: Compare the amount of time a 20 solar mass star will stay on the main sequence to the length of time ... (Read 81 times)

wenmo

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
Compare the amount of time a 20 solar mass star will stay on the main sequence to the length of time its iron core can exist.
 
  What will be an ideal response?

Question 2

The youngest features visible with telescopes on the Moon are:
 
  A) the volcanoes seen erupting in the highlands.
  B) the craters sitting atop the mare.
  C) the darkest regions of the mare.
  D) the bright polar caps of new ice.
  E) the scarps recently created by tectonic activity.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mistyjohnson

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 27, 2018
Answer to Question 1

A 20 solar mass star will stay on the main sequence for 10 million years. Its iron core can exist for only a day.

Answer to Question 2

B


wenmo

  • Member
  • Posts: 540
Reply 2 on: Jul 27, 2018
:D TYSM

ashely1112

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

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.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Solar Neutrino Experiment Solar Neutrino Experiment
How Axis Tilt Affects the Intensity of Solar Radiation How Axis Tilt Affects the Intensity of Solar Radiation
Measuring the Weight and Length of an Infant Measuring the Weight and Length of an Infant
The amount each injector is able to flow is displayed in glass cylinders are each injector for a ... The amount each injector is able to flow is displayed in glass cylinders are each injector for a ...
Body Mass Index (IBM) Body Mass Index (IBM)
Lab: Mass Relationships in Chemical Reaction Lab: Mass Relationships in Chemical Reaction
Video: Fertilization and Development

For a complete list of videos, visit our video library