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

Author Question: For a galaxy 200 Mpc away, a useful standard candle would be the ________. Fill in the blank(s) ... (Read 36 times)

kshipps

  • Hero Member
  • *****
  • Posts: 571
on: Jul 27, 2018
For a galaxy 200 Mpc away, a useful standard candle would be the ________.
 
  Fill in the blank(s) with correct word

Question 2

Describe how Eratosthenes first measured the size of Earth over 2000 years ago.
 
  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

cclemon1

  • Sr. Member
  • ****
  • Posts: 312
Reply #1 on: Jul 27, 2018
Answer to Question 1

Type I supernova

Answer to Question 2

Eratosthenes used measurements of the angle of the Sun in the sky at noon on the summer solstice in two places in Egypt. It was directly overhead in Syene and cast no shadows. In Alexandria, however, there was a slight shadow, indicating that the Sun was 7 degrees away from overhead. Eratosthenes concluded that Alexandria lies at a latitude 7 degrees north of Syene. The circumference of Earth is then the distance between Syene and Alexandria divided by the fraction of the circle (7/


kshipps

  • Member
  • Posts: 571
Reply 2 on: Jul 27, 2018
Wow, this really help

Kedrick2014

  • Member
  • Posts: 359
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

The elliptical galaxy Centaurus A at visible, far-infrared and x-ray wavelengths. The elliptical galaxy Centaurus A at visible, far-infrared and x-ray wavelengths.
Heart Label Blank Heart Label Blank
a) Standard PCR machine used for genotyping and (b) agarose gel to detect DNA fragments. a) Standard PCR machine used for genotyping and (b) agarose gel to detect DNA fragments.
Massage is used as a complement to standard medical treatment in hospitals and skilled nursing ... Massage is used as a complement to standard medical treatment in hospitals and skilled nursing ...
How to fully analyze the standard and factored form of a quadratic equation (Question 1) How to fully analyze the standard and factored form of a quadratic equation (Question 1)
The Standard Rain Gauge The Standard Rain Gauge
Video: Bone processes - resorption and deposition, remodeling and response to stress in adult bones

For a complete list of videos, visit our video library