The most unreliable (variable) diagnostic property of minerals such as quartz is ________.
Fill in the blank(s) with the appropriate word(s).
color
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?Two mirrors are at right angles to one another. If an object is placed near the mirrors, what is the largest number of images that would be seen in the mirrors?
A. ?3 B. ?2 C. ?4 D. ?5 E. ?6
The proton contains which of the following combination of quarks?
a. two up quarks and one down quark b. one up quark and two down quarks c. one top quark and two bottom quarks d. two top quarks and one bottom quark
When we consider how frequently an oscillating system vibrates we're talking about
A) frequency. B) period. C) wavelength. D) amplitude.
An ancient building was known to have been built 4000 years ago. Approximately what proportion of Carbon-14 atoms are still in the building's wooden framing compared to the number which were present at the time of its construction? (half life of 14C = 5730 years)
a. 0.696 c. 0.500 b. 0.616 d. 0.425