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

Author Question: The Cassegrain reflector needs a primary concave main mirror and a smaller, convex secondary mirror ... (Read 32 times)

sarasara

  • Hero Member
  • *****
  • Posts: 521
on: Jul 27, 2018
The Cassegrain reflector needs a primary concave main mirror and a smaller, convex secondary mirror to reflect light back through a hole in the primary.
 
  Indicate whether the statement is true or false

Question 2

Why is the impact theory now preferred as an explanation for the Moon's origin?
 
  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

poopface

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 27, 2018
Answer to Question 1

TRUE

Answer to Question 2

The capture theory is unlikely for a body as big as the Moon, while the coformation theory would have the Moon orbit our equator as it condensed. The impacting body would be of different composition than the Earth, and the heat of impact would drive off the lighter materials, as noted for the Moon's crust. The body would also have been moving in the ecliptic plane before impact, and the Moon still orbits close to the ecliptic even now.


sarasara

  • Member
  • Posts: 521
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

Dinolord

  • Member
  • Posts: 313
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Illustration showing how the primary breast tumor metastasized through the lymphatic and blood vesse Illustration showing how the primary breast tumor metastasized through the lymphatic and blood vesse
Primary pulse points of the body. Primary pulse points of the body.
Mirror Reflection Mirror Reflection
Motifs of protein secondary structure Motifs of protein secondary structure
Twelve primary energy channels and the Conception and Governing Vessels of Traditional Chinese ... Twelve primary energy channels and the Conception and Governing Vessels of Traditional Chinese ...
High net primary productivity High net primary productivity
Video: Protein Secondary and Tertiary Structures - Animation

For a complete list of videos, visit our video library