Kepler's idea that planets move in ellipses around the sun is best classified as
A) a fact.
B) an incorrect fallacy.
C) an experimental observation.
D) a useful theory.
E) a hallucination.
D
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Scientific Notation: Write out the number 8.42 × 10-5 in full with a decimal point and correct number of zeros.
A. 0.00000842 B. 0.0000842 C. 0.000842 D. 0.00842
Light having a frequency in vacuum of 6.0 × 1014 Hz enters a liquid of refractive index 2.0. In this liquid, its frequency will be
A) 12 × 1014 Hz B) 6.0 × 1014 Hz C) 3.0 × 1014 Hz D) 1.5 × 1014 Hz E) None of the above choices are correct.
An unpolarized beam of light of a single pure color can be split apart into two separate beams by using
A. a birefringent material like calcite. B. the human retina. C. a thin layer of oil. D. metal-ceramic inversion.
How many degrees separate the central meridians that each time zone is based on?
What will be an ideal response?