More than 2000 years ago, Hipparchus compared the positions of some stars with their positions recorded nearly two centuries previously and realized that:
A) the celestial poles and equator remained stationery.
B) the celestial poles and equator were slowly moving across the sky.
C) the stars were moving closer to each other.
D) the stars were moving across the sky randomly.
B
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What is the relativistic momentum of a 0.456-kg rest mass moving at 1.20 × 108 m/s?
A) 5.47 × 107 kg?m/s B) 5.57 × 107 kg?m/s C) 5.67 × 107 kg?m/s D) 5.87 × 107 kg?m/s E) 5.97 × 107 kg?m/s
The secondary rainbow is dimmer than the primary rainbow mainly because
A) its colors are inverted. B) it is larger, and its energy is spread over more area. C) it is farther from the viewer. D) it simply has less energy than the primary bow. E) of an extra reflection and refraction in the drops.
Lenz's Law: According to Lenz's law, the induced current in a circuit always flows to oppose the external magnetic field through the circuit.
A. True B. False
Newtonian physics, coupled to the idea that everything is made of atoms, has led many scientists and philosophers to the conclusion that everything in the universe, including all human actions and human feelings, is pre-determined by the laws of
physics and acts just like a machine. Which of the following statements is a scientifically-acceptable reason for disagreeing with this conclusion? A) Isaac Newton himself believed that humans have free will. B) We should never accept scientific theories as absolute truth. C) Both of the above. D) Our own intuitions, or beliefs, inform us that we actually do have free will. E) None of the above.