« previous next »

Author Question: What is the most likely cause of the mantle seismic velocity transition zones at 410 and 660 ... (Read 41 times)

brutforce

  • Hero Member
  • *****
  • Posts: 540
on: Jul 16, 2018
What is the most likely cause of the mantle seismic velocity transition zones at 410 and 660 kilometers?
 
  What will be an ideal response?

Question 2

How was the radius of Earth determined? Is Earth a perfect sphere?
 
  What will be an ideal response?


mcni194

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Jul 16, 2018
Answer to Question 1

The most likely cause of the mantle seismic velocity transition zones at 410 and 660 km is high-pressure repacking of the crystal structures of olivine and pyroxene.

Answer to Question 2

Erastosthenes used geometric relationships to determine Earth's radius. This was later refined. Newton recognized Earth would bulge at its equator due to rotation, and calculated its radius, which would later be used to determine its mass, based on gravitational interaction with other planets.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Karen McCoy, Considering Mother's Mantle Karen McCoy, Considering Mother's Mantle
Locations and reference zones of trigger points that cause headaches. A. Upper trapezius. B. ... Locations and reference zones of trigger points that cause headaches. A. Upper trapezius. B. ...
Calculate the velocity of the red rock after collision Angle measured counterclockwise from the ... Calculate the velocity of the red rock after collision Angle measured counterclockwise from the ...
If you walk 5.0 m horizontally forward at a constant velocity carrying a 10 N object, the ... If you walk 5.0 m horizontally forward at a constant velocity carrying a 10 N object, the ...
Demographic transition model for changes in population growth rates and sizes, correlated with long- Demographic transition model for changes in population growth rates and sizes, correlated with long-
Intertidal Zones: Sandy Coastlines Intertidal Zones: Sandy Coastlines
Video: Osmosis - Isotonic, Hypotonic, and Hypertonic​ Solutions

For a complete list of videos, visit our video library