If we are optimistic in our assumptions about the development of life and intelligence, then the number of technological civilizations in the galaxy should equal the:
A) average lifetime of a civilization.
B) number of stars forming per year.
C) average number of planets per star.
D) number of stars in the galaxy's habitable zone.
E) average number of planets that produce life.
A
You might also like to view...
If eclipses occur in repeatable patterns, then explain why an eclipse is not visible from the same place on Earth after one Saros cycle
What will be an ideal response?
______ refers to large and complex collections of information from a variety of sources, including website statistics, e-commerce transactions, and social media profiles.
A. Digital footprint B. Information overload C. Big data D. PII
The speed of FM waves will be observed to be c = 2.9979 × 10^8 m/s when the antenna emitting the waves is
a. at rest relative to the receiving antenna. b. moving to the right of the detecting antenna at 0.5c. c. moving to the left of the detecting antenna at 0.5c. d. moving as described in (a), (b) or (c) above. e. moving at 2.9979 × 10^8 m/s.
There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which is the more likely scenario?
A) the huge size of the Atlantic Ocean makes this impossible B) although the force on his finger would have been huge, the pressure would have been small enough for this to occur C) the force on his finger would have been less than 1 N D) both force and pressure on his finger would have been great, but not too great for a public-spirited Dutch lad E) none of the above