The ratio of a photon's energy to its frequency is
A) its speed.
B) its wavelength.
C) its amplitude.
D) Planck's constant.
E) none of the above
Answer: D
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Constellation names are from _____ translated into _______, the language of science in Europe to the 19th century
a. Greek; Latin b. Latin; Greek c. Latin; Arabic d. Greek; English e. Greek; Italian
An archaeologist finds the 14C in a sample of of material to be decaying at 107 counts per second. A modern 1.00-g sample of the same material decays at 151 counts per second. The half-life of 14C is 5730 y. How old is the sample?
A) 12,200 y B) 8460 y C) 25,100 y D) 12,600 y
The supernova that formed M-1, the Crab Nebula, was observed in:
A) 1572 AD by Tycho Brahe. B) 1604 AD by Johannes Kepler. C) 1054 AD by Chinese and Middle Eastern astronomers. D) 1006 by observers in the southern hemisphere. E) about 9,000 BC by all our ancestors.
Synthetic compounds that can be molded and hardened are called ______________
Fill in the blank(s) with correct word