Which of the following is true of Claudius Ptolemy?
A) He was interested in philosophical rather than practical questions about the Universe.
B) For him, first principles took second place to accuracy.
C) He believed that Earth was at the exact center of the Universe.
D) He disagreed completely with Aristotle's ideas of the Universe.
B
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If you know the impulse that has acted on a body of mass m you can calculate
a. its initial velocity. b. its final velocity. c. its final momentum. d. the change in its velocity. e. its acceleration during the impulse.
The postulate(s) of special are (is)
A. the speed of light is the same in all inertial reference frames. B. E0= mc2. C. the principle of conservation of momentum is true. D. the laws of physics are the same in all inertial reference frames. E. the principle of conservation of energy is true.
Uranus and Neptune have methane clouds but Jupiter and Saturn do not. Which factor explains why?
A) The stronger gravity on Jupiter and Saturn pulls methane downward so that it can't form clouds. B) Jupiter and Saturn do not contain any methane gas. C) The rapid rotation of Jupiter and Saturn prevents methane clouds from forming. D) Temperatures on Jupiter and Saturn are too high for methane to condense.
The direction of vibration for an electron and the plane of polarization of the light it emits
A) are the same. B) are at right angles to each other. C) may or may not be at right angles to each other. D) are independent of each other.