Which of the following statements best describes the size of the largest asteroid, Ceres?
A) It is about the size of a terrestrial planet.
B) It is smaller than the jovian planets but larger than the terrestrial planets.
C) It is a little less than half the diameter of our Moon.
D) It is no larger than a typical mountain on one of the terrestrial planets.
C
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A cell's DNA molecules are constructed of
a. amino acids. b. proteins. c. sugars, phosphates, and bases. d. all of the above e. none of the above
Which star is the furthest away if all have the same apparent brightness?
a) type G main sequence star b) type F main sequence star c) type M main sequence star d) type A main sequence star e) white dwarf
The Hertzsprung-Russell Diagram plots ________ against the spectral type or temperature
A) distance B) luminosity or absolute magnitude C) brightness or apparent magnitude D) size or density E) mass
The wavelengths corresponding to the harmonics of a string with fixed ends can be found by saying that the length of the string must be equal to
A) an odd number of quarter-wavelengths. B) an odd number of third-wavelengths. C) an odd number of half-wavelengths. D) an integer number of half-wavelengths. E) an integer number of wavelengths.