An uncharged pith ball is suspended by a nylon fiber. When a negatively-charged rubber rod is brought near the pith ball, without touching, the ball
A) becomes charged by induction.
B) becomes polarized.
C) is repelled by the rod.
D) is unaffected.
E) none of the above
Answer: B
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A recent sunspot maximum occurred in 2013 . What is the year of the sunspot maximum that immediately follows the 2013 maximum if the solar cycle continues?
a. 2017 b. 2019 c. 2022 d. 2024 e. The last cycle started a Maunder minimum and the next maximum cannot be predicted.
Photon Energy: If the wavelength of a photon is doubled, what happens to its energy?
A. It is reduced to one-half of its original value. B. It stays the same. C. It is doubled. D. It is increased to four times its original value. E. It is reduced to one-fourth of its original value.
Physics is NOT:
a. the study of the material world. b. the search for patterns in the behavior of material objects. c. the search for rules that describe the behavior of objects in the Universe. d. a discipline that covers the entire span of space and time. e. a fixed and unchanging body of knowledge.
Which exoplanet detection method requires us to be in the same plane as the exoplanetary system?
A. Direct imaging B. Transit method C. Radial-velocity method D. Gravitational lensing E. None of these choices are correct.