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

Author Question: Identify a true statement about main-sequence stars. A) They balance their gravity by fusing ... (Read 30 times)

tiara099

  • Hero Member
  • *****
  • Posts: 588
on: Jul 27, 2018
Identify a true statement about main-sequence stars.
 
  A) They balance their gravity by fusing hydrogen.
  B) They generate energy by breaking uranium isotopes.
  C) They do not increase in size as they consume their fuel.
  D) They do not undergo any molecular change during their life spans.

Question 2

When the nuclear reactions begin making too much energy in a star, by virtue of the natural thermostat, the star:
 
  A) would expand slightly.
  B) would increase its central temperature.
  C) would increase its density.
  D) would reduce the mass by a factor of 0.5.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

otokexnaru

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

A


tiara099

  • Member
  • Posts: 588
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

raili21

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Unique markings identify individual humpback whales. Unique markings identify individual humpback whales.
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999 True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
Post–Main-Sequence Evolution Post–Main-Sequence Evolution
Example of Reconciling a Bank Statement Cont. Example of Reconciling a Bank Statement Cont.
Calcium balance. Calcium balance.
Acid–Base Balance Acid–Base Balance
Video: Insulin (glucose uptake by body cells), glycogenesis and lipogenesis

For a complete list of videos, visit our video library