The period-luminosity relation for Cepheid and RR Lyrae variable stars can be used for ______________
Fill in the blank(s) with correct word
distance measurements
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List 7 Physical properties of minerals that are most useful in identifying minerals.
What will be an ideal response.
Which of the following is not a meson?
a. the phi c. the pion b. the kaon d. All of the above are mesons.
Chromatic aberration occurs in a ____ telescope when ____
a. reflecting; different colors of light do not focus at the same point. b. refracting; different colors of light do not focus at the same point. c. reflecting; light of different wavelengths get absorbed by the mirror. d. refracting; light of different wavelengths get absorbed by the lens.
Radioactivity Basics: When a ?- particle is emitted from an unstable nucleus, the atomic mass number of the nucleus
A. increases by 1. B. decreases by 1. C. increases by 2. D. decreases by 2. E. does not change.