______________ is defined as the angular measurement, in degrees, east or west of the reference meridian
Fill in the blank(s) with correct word
Longitude
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On the main sequence on an H-R diagram, our Sun lies at about ________
Fill in the blank(s) with correct word
The measured temperature of the cosmic background radiation is ____________________
Fill in the blank(s) with correct word
A object is 12 cm in front of a concave mirror, and the image is 3.0 cm in front of the mirror. What is the focal length of the mirror?
A) 0.25 cm B) 15 cm C) 4.0 cm D) 2.4 cm E) 1.3 cm
The discovery of any kind of life beyond the Earth would
A) cause a profound change in perspective of the whole of humanity B) be of interest to all scientists, but of little interest to the wider public C) be of no interest to anyone at all D) only be on interest to biologists