« previous next »

Author Question: The Earth's circumference was first determined by: A) Aristotle using lunar eclipses. B) ... (Read 96 times)

jeatrice

  • Hero Member
  • *****
  • Posts: 543
on: Jul 27, 2018
The Earth's circumference was first determined by:
 
  A) Aristotle using lunar eclipses.
  B) Pythagoras with geometry.
  C) Hipparchus with stellar parallaxes.
  D) Erastothenes with solstice shadows.
  E) Aristarchus with first and third quarter Moon timings.

Question 2

Galaxies contain at most one supermassive black hole.
 
  Indicate whether the statement is true or false


chloejackso

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

FALSE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

jeatrice

  • Hero Member
  • *****
  • Posts: 543
Reply #2 on: Jul 27, 2018
Thank you!


chloejackso

  • Sr. Member
  • ****
  • Posts: 316
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

The open ocean is the most extensive biome on earth. The open ocean is the most extensive biome on earth.
Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind
Earth’s Magnetic Field Earth’s Magnetic Field
Lightning on Earth Lightning on Earth
Relative Sizes of Dwarf Planets and Earth Relative Sizes of Dwarf Planets and Earth
Earth Present Earth Present
Video: Metaphase I Animation

For a complete list of videos, visit our video library