As you approach a steady light source, the wavelength of the emitted light appears
A) longer.
B) shorter.
C) the same.
Answer: B
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Suppose you go outside and see the view shown when you look due south. Knowing that the stars of Orion's Belt lie close to the celestial equator, what can you conclude?
A) You are in the Northern Hemisphere. B) You are in the Southern Hemisphere. C) It is winter. D) In a couple of hours, Lepus will be higher in the sky than Orion.
If a wave's frequency doubles, its wavelength
A) is halved. B) is also doubled. C) is unchanged, as c is constant. D) is now 4 times longer. E) becomes 16 times longer.
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1536 Hz. You move between the speakers, along the line joining them, at a constant speed of 2.8 m/s
What beat frequency do you observe? The speed of sound in the room is 330 m/s. A) 13 Hz B) 431 Hz C) 26 Hz D) 4.7 Hz E) 118 Hz
Which of the following is not true of the fossil record?
A) The fossil record spans 3 billion years of Earth's 4.6 billion year age. B) The most common fossils are from organisms that had hard parts like shells and bones. C) Similar to present day stromatolites, the first fossils were simple, anaerobic algal plants. D) The Paleozoic era is credited with the emergence of life.