An emission spectrum can be used to identify a(n):
A) proton.
B) electron.
C) neutron.
D) atom.
E) neutrino.
D
Physics & Space Science
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Vision Problems: What is the power of the lens that has a focal length of 40 cm and a diameter if 5.0 cm?
A. -2.5 diopters B. +20 diopters C. +0.20 diopters D. +2.5 diopters E. +2.7 diopters
Physics & Space Science
A theory in the field of science is
A) an educated guess. B) less than a fact. C) a synthesis of a large body of well-tested knowledge. D) unchangeable.
Physics & Space Science
NH3 is an example of
A) a molecule only B) a compound only C) both a molecule and a compound D) a collection of isolated atoms
Physics & Space Science
An example of a transverse wave is a
a. sound wave in air b. wave on a rope c. water wave d. sound wave in a metal bar e. none of the above
Physics & Space Science