What do you notice about the relationship between the angular size of the galaxy and its redshift (how far the wavelength is shifted)?
A: The redshift tends to be larger if the angular size is smaller.
B: The redshift tends to be smaller if the angular size is smaller.
C: There seems to be no relationship between redshift and angular size.
Ans: A: The redshift tends to be larger if the angular size is smaller.
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On a clear night when an observer in Los Angeles sees a first-quarter Moon, an observer in London would see
a. a full Moon. b. a first-quarter Moon. c. a new Moon. d. a third-quarter Moon. e. any of the other choices; it depends on the time of day.
Compound Microscope: In a compound microscope
A. both the objective and the eyepiece form real images. B. magnification is provided by the objective lens and not by the eyepiece. The eyepiece merely increases the resolution of the image viewed. C. magnification is provided by the objective and not by the eyepiece. The eyepiece merely increases the brightness of the image viewed. D. the magnification is m1 + M2, where m1 is the lateral magnification of the objective and M2 is the angular magnification of the eyepiece. E. the image of the objective serves as the object for the eyepiece.
The polar vortex at the south pole of Venus is
A. a low-pressure, high-humidity storm, much like a hurricane on Earth. B. a region where cooler gases sink to the surface before moving back to the equatorial regions. C. a region of the atmosphere where the surface can be seen from orbit. D. a high-pressure zone with winds flowing away from its center.
A star of spectral type G lives approximately how long on the main sequence?
A) 10 billion years B) 1 billion years C) 10 million years D) 1,000 years E) 10,000 years