Author Question: A ruby laser beam ( = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, ... (Read 105 times)

big1devin

  • Hero Member
  • *****
  • Posts: 583
A ruby laser beam ( = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?
 a. 500 m
  b. 250 m
  c. 120 m
  d. 1.0 km
  e. 2.7 km

Question 2

The Moon's average density is
 a. greater than Earth's.
  b. less than Earth's.
  c. approximately the same as Earth's.
  d. nonexistent because water is not present.



makaylafy

  • Sr. Member
  • ****
  • Posts: 347
Answer to Question 1

c

Answer to Question 2

b



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

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?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

For a complete list of videos, visit our video library