An object 2.0 cm tall is placed 24 cm in front of a convex mirror having a focal length of magnitude 30 cm
(a) Where is the image formed and how far is it from the mirror?
(b) How tall is the image?
(a) 13 cm behind the mirror (b) 1.1 cm
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In the Drake equation, Nc = N* × fp × nHZ × fL × fI × fs, the factor Nc is:
A) the number of planets in a solar system. B) the average number of stars that have planets. C) the average number of planets in each solar system suitably placed in the habitable zone. D) the number of technological civilizations in the Milky Way Galaxy with which you might communicate.
What are the two most important properties for optical telescopes?
a. high magnification and high angular resolution. b. high magnification and low angular resolution. c. low magnification and large collecting area. d. a large collecting area and high angular resolution. e. a large collecting area and low angular resolution.
The Crab Nebula is a bright, long lasting supernova remnant that was made by a ________ supernova
Fill in the blank(s) with correct word
The number of daylight hours before 12 noon is approximately the ______________ as the number after 12 noon
Fill in the blank(s) with correct word