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

Author Question: Why are active galaxies assumed to be associated with galactic collisions? What will be an ideal ... (Read 76 times)

RRMR

  • Hero Member
  • *****
  • Posts: 557
on: Jul 27, 2018
Why are active galaxies assumed to be associated with galactic collisions?
 
  What will be an ideal response?

Question 2

The NASA Curiosity rover exploring Mars carries a number of scientific instruments, including a spectrograph (a device for recording a spectrum), and a high intensity laser. On several occasions, Curiosity has fired its laser at the surface of a rock sample, while observing the process with a spectroscope. The laser is intense enough to vaporize the atoms on the surface of the sample into a hot, excited gas. Why is this a useful technique for the rover to employ?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

deja

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 27, 2018
Answer to Question 1

Galactic collisions transfer mass between galaxies. This will cause extra matter to fall into the central black hole, triggering an eruption.

Answer to Question 2

The vaporized material will contain the elements present in the surface of the rock. Since it is a hot, excited gas, it will radiate an emission spectrum that can be recorded by the spectroscope. The emission lines can be analyzed to determine what chemical elements are present in the rock.

The technique is especially useful since it does not involve any physical contact with the rock. Only two simple tools are needed, and the rover may be able to use the technique to study samples that could not be reached by physical parts of the rover.


RRMR

  • Member
  • Posts: 557
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

raenoj

  • Member
  • Posts: 340
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Types of active transport. Types of active transport.
Photosynthetically active radiation (PAR) diminishes substantially with passage through the canopy o Photosynthetically active radiation (PAR) diminishes substantially with passage through the canopy o
Active exercise. Active exercise.
Mechanisms of Active and Passive Immunity Mechanisms of Active and Passive Immunity
Active range of motion (AROM) tests for the shoulder. A, Apley Scratch Test. B and C, Internal ... Active range of motion (AROM) tests for the shoulder. A, Apley Scratch Test. B and C, Internal ...
Primary Active Transport Primary Active Transport
Video: Digestive System Animation

For a complete list of videos, visit our video library