« previous next »

Author Question: What are the two major ways in which extrasolar planets have been discovered? A) direct imaging ... (Read 33 times)

futuristic

  • Hero Member
  • *****
  • Posts: 638
on: Jul 27, 2018
What are the two major ways in which extrasolar planets have been discovered?
 
  A) direct imaging with large telescopes
  B) measuring changes in the star's brightness when a planet transits
  C) measuring the motion of the star due to the planets' gravitational tugs
  D) A and B
  E) A and C
  F) B and C

Question 2

What will happen in the Sun immediately after it has exhausted its supply of hydrogen in its core?
 
  A) The core will collapse and a supernova will result.
  B) The Sun will turn into a white dwarf and cool off forever.
  C) The helium core will shrink, heat, and start fusing helium to carbon.
  D) The helium core will shrink and heat; a shell of hydrogen will start fusing.


Dominic

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

F

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

The trilobite body is divided into three major sections The trilobite body is divided into three major sections
The Inner Planets: A Comparison The Inner Planets: A Comparison
The Major Divisions of the Peripheral Nervous System The Major Divisions of the Peripheral Nervous System
Metastatic spread of the tumor shown with imaging techniques. Metastatic spread of the tumor shown with imaging techniques.
Major Risk Factors for Hypertension Major Risk Factors for Hypertension
Bach, Minuet in G major, BWV Anh 114, Piano Bach, Minuet in G major, BWV Anh 114, Piano
Video: Body plan of euglena Animation

For a complete list of videos, visit our video library