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Author Question: A pair of stars orbit around one another in an elliptical orbit with a semi-major axis, a, of 1 AU ... (Read 99 times)

Marty

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on: Jul 27, 2018
A pair of stars orbit around one another in an elliptical orbit with a semi-major axis, a, of 1 AU with an orbital period, P, of 1 year. What is the mass of the pair of stars?
 
  a. 1 solar masses
  b. 2 solar masses
  c. 4 solar masses
  d. 8 solar masses
  e. 16 solar masses

Question 2

An ordinary glass lens forms an image by ____________ of light.
 
  a. reflection
  b. refraction
  c. diffraction


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phuda

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Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

b


Marty

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Reply 2 on: Jul 27, 2018
Excellent

dawsa925

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Reply 3 on: Yesterday
Gracias!

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