Define "intelligent civilization" according to Drake
What will be an ideal response?
Drake defined a technological civilization as a species capable of developing the technology to communicate with other species throughout the Galaxy.
You might also like to view...
A solar flare creates a radio disturbance on Earth a few minutes after going off and again several days later. Explain
What will be an ideal response?
The Tonga Trench in the Pacific Ocean is 36,000 feet deep. Assuming that sea water has an average density of 1.04 g/cm3, calculate the absolute (total) pressure at the bottom of the trench in atmospheres. (1.00 in = 2.54 cm, 1.00 atm = 1
01 × 105 Pa) A) 1.1 × 106 atm B) 1.1 × 105 atm C) 2.1 atm D) 1.1 × 108 atm E) 1.1 × 103 atm
If carbonic acid (H2CO3) were to undergo ionization, what would one of the products be?
A) H- B) CO2 C) H2O D) CO3-1 E) CO3-2
The energy gap between the valence and conduction bands in a certain semiconductor is 1.25 eV. What is the threshold wavelength for optical absorption in this substance?
A) 599 nm B) 639 nm C) 959 nm D) 873 nm E) 995 nm