Glasses prescribed to correct a nearsighted eye will have a ________ (sign) focal length.
Fill in the blank(s) with the appropriate word(s).
negative
-
minus
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What kinds of atomic nuclei were present when fusion ceased at the end of the era of nucleosynthesis?
A) only hydrogen B) only helium C) hydrogen, helium, and trace amounts of deuterium and lithium D) roughly equal amounts of each of the following: hydrogen, helium, deuterium, and lithium E) nuclei of all the chemical elements
The near point of a normal human eye is infinity
Indicate whether the statement is true or false
An amino acid is an organic molecule that contains both an amine group and a carboxyl group. At an acidic pH, which structure is most likely:
A) structure (a) B) structure (b) C) structure (c) D) All three structures are equally possible.
There is very little interstellar gas or dust in most elliptical galaxies
Indicate whether the statement is true or false