« previous next »

Author Question: What are the two major ways in which extrasolar planets have been discovered? A) direct imaging ... (Read 71 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?

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?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

A phylogeny showing the major modern angiosperm lineages A phylogeny showing the major modern angiosperm lineages
Major Impacts on Mercury and on Our Moon Major Impacts on Mercury and on Our Moon
Nonpharmacologic Therapies for Major Depression Nonpharmacologic Therapies for Major Depression
Major U.S. Centers of Cattle, Corn, Wheat, and Soybean Production Major U.S. Centers of Cattle, Corn, Wheat, and Soybean Production
Planets Planets
Direct Development vs. Incomplete Metamorphosis Direct Development vs. Incomplete Metamorphosis
Video: Brief Summary on Photosynthesis - Animation

For a complete list of videos, visit our video library