The frequency of a wave is
A) measured in hertz (Hz).
B) measured in cycles per second.
C) equal to the speed of the wave divided by the wavelength of the wave.
D) the number of peaks passing by any point each second.
E) all of the above
E
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Carbon-14 dating can reliably date ancient archeological samples up to approximately how many years?
A) 100 million B) 50 thousand C) 5 million D) 10 billion E) 5 thousand
Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
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Use this exhibit to answer the following question(s).
Refer to Exhibit 16-1. The point at which the object has zero velocity and negative acceleration is
A. A B. B C. C D. D E. E
With respect to the earth, object 1 is moving at speed 0.90 c to the right. Object 2 is moving to the left at speed 0.70 c with respect to object 1. How fast is object 2 moving with respect to the earth?
A) 0.12 c B) -0.20 c C) 0.54 c D) 0.20 c E) 1.6 c
Why do astronomers believe that galactic collisions cause active galactic nuclei?
What will be an ideal response?