« previous next »

Author Question: How were the elevations of the Himalayas surveyed in the mid-nineteenth century? How were the errors ... (Read 59 times)

FButt

  • Hero Member
  • *****
  • Posts: 519
on: Jul 16, 2018
How were the elevations of the Himalayas surveyed in the mid-nineteenth century? How were the errors in Everest's survey data interpreted by John Pratt and George Airy?
 
  What will be an ideal response?

Question 2

If you have removed half of Block A, how much of the remaining block will be exposed above water?
 
  a. 25
  b. 35
  c. 50
  d. 75


welcom1000

  • Sr. Member
  • ****
  • Posts: 298
Reply #1 on: Jul 16, 2018
Answer to Question 1

A telescope, mounted on a table tangential and perpendicular to Earth's center, is sighted on the North Star. This star is nearly directly above our rotational axis. The angle between the line drawn to the North Star and the line to the center of Earth determines latitude. However, this only works when Earth is uniform and the surface smooth. Large masses of rock pull the plumb bob towards them and away from the center of Earth, causing error, although calculated error was much greater than the observed error. Pratt proposed that the deflection is consistent with observations because the crust below the mountains is of lower density. Airy suggested that the crust was more dense than expected, providing a root below the mountain.

Answer to Question 2

c. 50


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

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.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
A nineteenth-century Japanese portrait of Commodore Matthew Perry, who “opened up” Japan in 1854. A nineteenth-century Japanese portrait of Commodore Matthew Perry, who “opened up” Japan in 1854.
Model of a longitudinal study in which 983 students were surveyed in 1984 and then again in 1985, 19 Model of a longitudinal study in which 983 students were surveyed in 1984 and then again in 1985, 19
A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a
Wang Guochen, c. nineteenth century Wang Guochen, c. nineteenth century
The Universe According to Ptolemy, Second Century A.D. The Universe According to Ptolemy, Second Century A.D.
Video: Major Elements in Biological Molecules: Nucleic acids

For a complete list of videos, visit our video library