Tycho Brahe's extremely accurate measurements of the planetary positions showed that
A) Kepler's theory was wrong.
B) both Ptolemy's theory and Copernicus's theory were correct.
C) both Ptolemy's theory and Copernicus's theory were wrong.
D) Copernicus's theory was wrong and Ptolemy's was correct.
E) Ptolemy's theory was wrong and Copernicus's theory was correct.
C
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Sketch possible interatomic potentials as a function of interatomic separation for two materials A and B. Material A has a high melting temperature and vaporization temperature and a high elastic modulus. Material B has a low melting and vaporization temperature and a low elastic modulus.
What will be an ideal response?
Which of the following can you observe about Venus with the naked eye?
a. Venus sometimes shines brightly in the eastern sky shortly before dawn b. Venus is visible at midnight when it is in its full phase c. When Venus is brightest, it is visible all night long d. Venus sometimes shines brightly in the western sky shortly after sunset
Which does not provide evidence for dark matter?
A: The large rotational velocities in galaxy disks. B: The light that dark matter radiates. C: The degree to which light is bent by galaxies and clusters. D: The universe is measured to be flat and regular matter is not enough to account for that. E: Motions of galaxies require more matter than just th
What is the direction of the angular momentum vector for a wheel spinning as shown below?
A. Upward
B. Downward
C. Clockwise
D. Counterclockwise
